") no-repeat center center;background-size:10px 16px;content:' '}@media(min-width:768px){.UeJNJ::before{display:none}}.cPCVUJ{min-height:389px;margin-bottom:16px;clear:both}@media(min-width:1000px){.cPCVUJ{min-height:380px}}.rAFIl{width:100%;box-sizing:border-box}@media(min-width:768px){.rAFIl{max-width:634px}}@media(min-width:1250px){.rAFIl{max-width:622px}}.dLkuvY{display:flex;width:auto;box-sizing:border-box;align-items:center;justify-content:flex-start;gap:4px;color:#ec1a2e;color:light-dark(#ec1a2e,#ec1a2e)}.jrwZqm{display:block;font:bold 14px/20px 'Indy Sans','Indy Sans Fallback',sans-serif;text-decoration-line:underline;margin-block:0;text-align:center}.dHXFkr{display:inline-flex;align-items:center;justify-content:center;gap:4px}.dHXFkr:hover .sc-aja53j-2,.dHXFkr:hover .sc-a5wy94-0{color:#ac2a2c;color:light-dark(#ac2a2c,#f58992)}.lcJUSj{font:normal 16px/20px 'Indy Sans','Indy Sans Fallback',sans-serif}.hJPJVF{display:flex;position:relative;overflow:hidden;width:auto;height:40px;flex-direction:column;order:-1;gap:8px;opacity:1;transition:all .5s ease-in-out;transition-behavior:allow-discrete}.hJPJVF::after{--fade-from:rgba(255,255,255,0);--fade-mid:rgba(255,255,255,0.5);--fade-to:#fff;position:absolute;bottom:0;left:0;z-index:1;width:100%;height:40px;background-image:linear-gradient(to bottom,var(--fade-from) 0,var(--fade-mid) 50%,var(--fade-to) 100%);content:'';opacity:1;pointer-events:none;transition:opacity 150ms ease-out}@supports(color:light-dark(red,red)){.hJPJVF::after{--fade-from:light-dark(rgba(255,255,255,0),rgba(0,0,0,0))}}@supports(color:light-dark(red,red)){.hJPJVF::after{--fade-mid:light-dark(rgba(255,255,255,0.5),rgba(0,0,0,0.5))}}@supports(color:light-dark(red,red)){.hJPJVF::after{--fade-to:light-dark(#fff,#000)}}@media(min-width:768px){.PdmgT{order:-1}}@media(min-width:768px){.eMEmGu{display:flex;position:relative;align-items:flex-start;margin-top:12px}}@media(min-width:1000px){.lfyduH .taboola{display:none}}.lfyduH:has(#taboola-carousel-thumbnails){min-height:426px}.lfyduH:has(#taboola-mid-article-thumbnails-crime){min-height:405px}@media(min-width:1000px){.lfyduH:has(#taboola-carousel-thumbnails),.lfyduH:has(#taboola-mid-article-thumbnails-crime){min-height:0}}.iUtUOL .tp-container-inner,.iUtUOL .sc-1suqprf-0{position:relative;box-shadow:0 -22px 16px 22px rgba(255,255,255,0.95);box-shadow:0 -22px 16px 22px light-dark(rgba(255,255,255,0.95),rgba(0,0,0,0.95))}.iUtUOL.closed{display:none}.dcGiwu{width:32px}.dcGiwu,.dcGiwu:focus{color:#3b5998;color:light-dark(#3b5998,#627aac)}.dcGiwu:hover,.dcGiwu:active,.dcGiwu:focus-visible{color:#2f4779;color:light-dark(#2f4779,#9cabcb)}@media(min-width:768px){.dcGiwu.mobile-only{display:none}}.fOiFgH{width:32px}.fOiFgH,.fOiFgH:focus{color:#000;color:light-dark(#000,#4e4e4e)}.fOiFgH:hover,.fOiFgH:active,.fOiFgH:focus-visible{color:#4e4e4e;color:light-dark(#4e4e4e,#919191)}@media(min-width:768px){.fOiFgH.mobile-only{display:none}}.enjvCw{width:32px}.enjvCw,.enjvCw:focus{color:#25d366;color:light-dark(#25d366,#25d366)}.enjvCw:hover,.enjvCw:active,.enjvCw:focus-visible{color:#1da851;color:light-dark(#1da851,#66e093)}@media(min-width:768px){.enjvCw.mobile-only{display:none}}.jctBRm{width:32px}.jctBRm,.jctBRm:focus{color:#ec1a2e;color:light-dark(#ec1a2e,#ec1a2e)}.jctBRm:hover,.jctBRm:active,.jctBRm:focus-visible{color:#ac2a2c;color:light-dark(#ac2a2c,#f58992)}@media(min-width:768px){.jctBRm.mobile-only{display:none}}.dzqQwN{display:flex;gap:12px}.dFzDMM .sc-17yxc4y-0{display:none}.dFzDMM:hover .sc-17yxc4y-0,.dFzDMM.bookmark-button-saved .sc-17yxc4y-0{display:block}.dFzDMM:hover .sc-17yxc4y-1,.dFzDMM.bookmark-button-saved .sc-17yxc4y-1{display:none}.dFzDMM.bookmark-button-saved .sc-17yxc4y-0{display:block}.dFzDMM.bookmark-button-saved .sc-17yxc4y-1{display:none}.dFzDMM.bookmark-button-saved:hover .sc-17yxc4y-0{display:none}.dFzDMM.bookmark-button-saved:hover .sc-17yxc4y-1{display:block}.lfNyeg{display:inline-block;width:32px;height:32px;color:#337e81;color:light-dark(#337e81,#70a5a7)}.sQzGY{display:flex;flex-direction:row;justify-content:center;gap:12px}.cNueyK{display:flex;position:relative;justify-content:center}@media(min-width:768px){.cNueyK{justify-content:flex-end;padding-top:12px;margin:0}}.dUmHef{display:flex}.sticky .dUmHef{flex-direction:column}.igSthU{overflow:hidden;height:23px;margin-bottom:8px;border-bottom:0;clear:both}@media(min-width:768px){.igSthU{height:25px}}.fvIzys{display:inline-block;flex-shrink:0;margin:0 12px 0 0;font:bold 14px/normal 'Indy Sans','Indy Sans Fallback',sans-serif}.fvIzys::after{content:':'}.knjHva{display:inline-block;margin-right:12px;margin-bottom:4px;color:#222;color:light-dark(#222,#fff);font:normal 14px/1.29 'Indy Sans','Indy Sans Fallback',sans-serif;text-decoration:underline}.knjHva::first-letter {text-transform:capitalize}@media(min-width:1000px){.subscribed .gryCYY{margin-top:-184px}.article-feature:not(.article-feature-video) .subscribed .gryCYY{margin-top:-407px}}.gryCYY>p{margin:16px 0}.article-premium .gryCYY>p{line-height:27px}.gryCYY>h2{font-size:21px}.article-climate .gryCYY>h2{color:#ec1a2e;color:light-dark(#ec1a2e,#ec1a2e)}.article-sgi .gryCYY>h2{color:#ec1a2e;color:light-dark(#ec1a2e,#ec1a2e)}.gryCYY>p:first-child{margin-top:0}.gryCYY span:first-child~p:first-of-type{margin-top:0}.FtcnY{display:flex;position:relative;max-width:100%;min-height:600px;justify-content:center;margin:0 auto;background-color:transparent;clear:both}@media(min-width:1000px){.FtcnY{min-height:450px}}.teads .FtcnY{display:block}.FtcnY [data-mpu]{position:sticky;top:16px}@media(min-width:1000px){.cCcguK{display:none}}.cCcguK[data-mpu1]{min-height:600px}.cCcguK.pb-20{padding-bottom:20px}.dFpFuY{overflow:hidden;width:100%;box-sizing:border-box;margin-bottom:16px}@media(min-width:768px){.dFpFuY{max-width:634px}}@media(min-width:1250px){.dFpFuY{max-width:622px}}.dmMyEN{width:100%;box-sizing:border-box;padding:8px 12px 12px;border-top:8px solid #ec1a2e;border-top:8px solid light-dark(#ec1a2e,#ec1a2e);background-color:#fde8ea;background-color:light-dark(#fde8ea,#66000a)}@media(min-width:768px){.dmMyEN{padding-top:4px;padding-bottom:12px}}.fXvmgM{font:bold 22px/26px 'Indy Serif','Indy Serif Fallback',serif;margin:0 0 12px;text-align:center}@media(min-width:768px){.fXvmgM{font:bold 30px/34px 'Indy Serif','Indy Serif Fallback',serif;letter-spacing:-0.048px;margin-bottom:12px;text-align:left}}.ivTlwT{display:block;margin-bottom:12px}@media(min-width:768px){.ivTlwT{display:none}}.hfMbpT{display:flex;width:100%;box-sizing:border-box;align-items:center;justify-content:center;gap:4px;background-color:#fde8ea;background-color:light-dark(#fde8ea,#66000a);color:#ec1a2e;color:light-dark(#ec1a2e,#ec1a2e)}@media(min-width:768px){.hfMbpT{width:auto;justify-content:flex-start}}.dAuNha{display:block;font:bold 14px/20px 'Indy Sans','Indy Sans Fallback',sans-serif;text-decoration-line:underline;margin-block:0;text-align:center}.jiDyot{display:inline-flex;align-items:center;justify-content:center;gap:4px}.jiDyot:hover .sc-hez36s-5,.jiDyot:hover .sc-a5wy94-0{color:#ac2a2c;color:light-dark(#ac2a2c,#f58992)}.laZbyn{font:normal 16px/20px 'Indy Sans','Indy Sans Fallback',sans-serif}.juUDRT{display:flex;width:100%;flex-direction:column}@media(min-width:768px){.juUDRT{display:flow-root;gap:24px;transition:margin-bottom .3s ease-in-out}}.kRWakq{display:flex;width:100%;flex-direction:column;align-items:center;justify-content:center}@media(min-width:768px){.kRWakq{position:relative;z-index:1;width:212px;flex-shrink:0;justify-content:flex-start;margin-left:24px;float:right}}.eJjJXF{display:none;flex-direction:row;align-items:center;justify-content:center;gap:8px;margin-top:8px}@media(min-width:768px){.eJjJXF{display:flex;margin-top:12px}}.dLfZIO{display:flex;width:100%;align-items:center;justify-content:center;gap:8px;margin-top:8px;margin-bottom:12px}@media(min-width:768px){.dLfZIO{display:none}}@media(min-width:768px){.cqPbFA{order:-1}}.jZSKtc .sc-aja53j-5::after{--fade-from:rgba(253,232,234,0);--fade-mid:rgba(253,232,234,0.5);--fade-to:#fde8ea}@media(min-width:360px){.jZSKtc .sc-aja53j-5 .sc-aja53j-7{display:none}}@supports(color:light-dark(red,red)){.jZSKtc .sc-aja53j-5::after{--fade-from:light-dark(rgba(253,232,234,0),rgba(102,0,10,0))}}@supports(color:light-dark(red,red)){.jZSKtc .sc-aja53j-5::after{--fade-mid:light-dark(rgba(253,232,234,0.5),rgba(102,0,10,0.5))}}@supports(color:light-dark(red,red)){.jZSKtc .sc-aja53j-5::after{--fade-to:light-dark(#fde8ea,#66000a)}}.cKWiEj{margin:0 0 24px;font:normal 16px/20px 'Indy Sans','Indy Sans Fallback',sans-serif}.huxBsk{font:bold 16px/20px 'Indy Sans','Indy Sans Fallback',sans-serif}.jaiOuh{display:flex;min-height:600px;justify-content:center}@media(min-width:1000px){.jaiOuh{min-height:450px}}.jasvOK{min-height:600px}@media(min-width:1000px){.jasvOK{min-height:450px}}.jasvOK.mobile-only{display:block}@media(min-width:1000px){.jasvOK.mobile-only{display:none}}.jasvOK.desktop-only{display:none}@media(min-width:1000px){.jasvOK.desktop-only{display:block;margin-bottom:16px}}.jasvOK.desktop-only+p{margin-top:0}.jasvOK .third-party-ad{position:sticky;top:16px}.bYBoJE{width:100%;flex-grow:1}.bYBoJE .social-share{width:100%;padding-top:10px;padding-bottom:20px}@media(min-width:768px){.bYBoJE .social-share{justify-content:flex-start}}.bYBoJE .social-share.sticky{display:none}@media(min-width:1000px){.bYBoJE .social-share.sticky{display:flex;position:sticky;top:14px;width:34px;flex-direction:column;padding-top:0;margin-top:0;margin-left:-25%}.bYBoJE .social-share.sticky .sc-mgcah7-0{margin:0 0 16px}.article-feature-video .bYBoJE .social-share.sticky{margin-top:0}.article-feature:not(.article-feature-video) .bYBoJE .social-share.sticky{margin-top:35%}}.bYBoJE.sponsored-article img,.bYBoJE.sponsored-article video{width:100%;max-width:602px;height:auto}.bYBoJE.sponsored-article iframe{max-width:602px;max-height:400px}.bYBoJE .under-article-prompt-donations{padding-bottom:8px;margin-top:-3px}.bYBoJE .big-letter{--color:#222;display:flex;position:relative;width:0;height:0;align-items:center;justify-content:center;padding:40px;margin-top:22px;margin-right:12px;border:1px solid var(--color);float:left;font:normal 52px/1 'Indy Serif','Indy Serif Fallback',serif;text-transform:uppercase}.bYBoJE .big-letter:first-child{margin-top:6px}.bYBoJE .big-letter::before{position:absolute;top:0;left:0;width:100%;height:100%;box-sizing:border-box;border:1px solid var(--color);border-radius:50%;content:''}.bYBoJE #taboola-below-article-1{min-height:2350px}@media(min-width:768px){.bYBoJE #taboola-below-article-1{min-height:3370px}}.bYBoJE #taboola-below-article-1-split-num-1{min-height:130px}@media(min-width:768px){.bYBoJE #taboola-below-article-1-split-num-1{min-height:415px}}.bYBoJE .sc-fwko30-0+.sc-1xtsh2b-0{margin-top:-16px}@media(min-width:768px){.bYBoJE{max-width:636px;margin:0}}@media(min-width:1000px){.bYBoJE{max-width:624px;margin:0}.bYBoJE.subscribed{max-width:636px}}@media(max-width:999px){.bYBoJE{padding-right:0}.bYBoJE .under-article-prompt-donations{margin-top:-18px}}.bYBoJE .anchor-nav-header{scroll-margin-top:79px}.bYBoJE .anchor-nav-header a{color:#222;color:light-dark(#222,#fff)}.bYBoJE .anchor-nav-header a:hover{color:#222;color:light-dark(#222,#fff)}@supports(color:light-dark(red,red)){.bYBoJE .big-letter{--color:light-dark(#222,#fff)}}.jYgehE{display:flex;flex-wrap:wrap;justify-content:flex-start;margin-bottom:8px;color:#646464;color:light-dark(#646464,#bdbdbd);font:normal 16px/20px 'Indy Sans','Indy Sans Fallback',sans-serif}@media(min-width:768px){.jYgehE{width:70%;align-items:center;justify-content:flex-start;margin-bottom:0;font:normal 16px/24px 'Indy Sans','Indy Sans Fallback',sans-serif}}@media(min-width:1000px){.jYgehE{width:70%;margin-bottom:0}}.dMNxBE{display:flex;height:20px;margin:0 12px 8px 0}.article-voices .dMNxBE{height:auto}@media(min-width:425px){.article-voices .dMNxBE{height:20px}}.dMNxBE::before{display:inline-block;align-self:center;margin-top:1px;margin-right:12px;content:'\2022';transform:scale(1.5)}.dMNxBE:first-child::before{content:none}@media(min-width:768px){.dMNxBE{height:24px;margin-bottom:0}.dMNxBE::before{margin-top:2px}}.dMNxBE time{display:block}.dMNxBE time::first-letter {text-transform:capitalize}.fqqqQy{display:inline-block;margin:0 12px 8px 0;color:#ec1a2e;color:light-dark(#ec1a2e,#ef4757);font:bold 16px/20px 'Indy Sans','Indy Sans Fallback',sans-serif;letter-spacing:-0.5px}.fqqqQy:hover,.fqqqQy:active{color:#ac2a2c;color:light-dark(#ac2a2c,#f58992)}@media(min-width:768px){.fqqqQy{margin-bottom:0}}.ePBJFt{margin:0 12px 8px -8px}@media(min-width:768px){.ePBJFt{margin-bottom:0}}.oMeFT{margin:0 4px 8px 0}.oMeFT::before{display:inline-block;margin-top:2px;margin-right:12px;color:#646464;color:light-dark(#646464,#bdbdbd);content:'\2022';transform:scale(1.5)}.oMeFT:first-child::before{display:none}@media(min-width:768px){.oMeFT{margin-bottom:0}}.bMRmfY{display:flex;justify-content:flex-start;padding:0;margin:0 0 16px}@media(min-width:768px){.bMRmfY{display:flex;width:30%;align-items:center;justify-content:flex-end;margin:0}}@media(min-width:1000px){.bMRmfY{width:30%}}.dfBarH{padding-top:0;border-top:0;border-bottom:0}@media(min-width:768px){.dfBarH{display:flex;flex-flow:row wrap;padding-bottom:16px}.dfBarH .sc-mzrbq8-0{order:1}.dfBarH .sc-mzrbq8-6{order:2}}@media(min-width:1000px){.dfBarH{flex-direction:row}}.klGymp{padding:16px 12px 12px;text-align:left;font:bold 14px/18px 'Indy Sans','Indy Sans Fallback',sans-serif}@media(min-width:768px){.klGymp{padding:16px 16px 12px}}.article-infact .klGymp{padding:16px 0}@media(min-width:1000px){.klGymp{padding:24px 0 19px}.article-feature .klGymp{max-width:968px;margin:0 auto}}.klGymp a{color:#222;color:light-dark(#222,#fff)}.klGymp a:hover{color:#ac2a2c;color:light-dark(#ac2a2c,#f58992)}.klGymp a:hover::after{color:#222;color:light-dark(#222,#fff)}.klGymp a::after{margin-right:4px;margin-left:4px;content:'>'}.klGymp a:last-child::after{display:none}.gbPKFW{margin:0 0 20px;letter-spacing:0}.drRZfZ{margin:0;color:#646464;color:light-dark(#646464,#bdbdbd);font:normal 16px/20px 'Indy Sans','Indy Sans Fallback',sans-serif}@media(min-width:768px){.drRZfZ{font:normal 18px/22px 'Indy Sans','Indy Sans Fallback',sans-serif}}@media(min-width:1000px){.drRZfZ{font:normal 20px/24px 'Indy Sans','Indy Sans Fallback',sans-serif}}.drRZfZ p{font:inherit}.article-feature .drRZfZ a{font-weight:bold}.hYTnrH{max-width:968px;margin:0 auto;background:#fff;background:light-dark(#fff,#000)}@media(min-width:1000px){.parallax .hYTnrH{max-width:1240px}}.fdtMsm{font:bold 32px/36px 'Indy Serif','Indy Serif Fallback',serif;letter-spacing:-0.0156em}@media(min-width:768px){.fdtMsm{font:bold 44px/48px 'Indy Serif','Indy Serif Fallback',serif;letter-spacing:-0.0113em}}@media(min-width:1000px){.fdtMsm{font:bold 54px/58px 'Indy Serif','Indy Serif Fallback',serif;letter-spacing:-0.0092em}}.kZQexU .sc-qvufca-0{margin:0 12px}@media(min-width:768px){.kZQexU .sc-qvufca-0{max-width:968px;margin-right:16px;margin-left:16px}}@media(min-width:1000px){.kZQexU .sc-qvufca-0{margin-right:auto;margin-left:auto}}.kZQexU .sc-qvufca-2{margin-bottom:16px;color:#222;color:light-dark(#222,#fff)}@media(min-width:768px){.kZQexU .sc-qvufca-2{margin-bottom:18px}}@media(min-width:1000px){.kZQexU .sc-qvufca-2{margin-top:0}}.article-feature .kZQexU .sc-qvufca-2{text-align:center}@media(min-width:1000px){.article-feature .kZQexU .sc-qvufca-2{max-width:968px}}.kZQexU .sc-1cmj4ml-0{margin-bottom:16px}@media(min-width:1000px){.kZQexU .sc-1cmj4ml-0{max-width:968px}}.kZQexU .sc-1cmj4ml-0 p{margin-top:0}@media(min-width:768px){.kZQexU .sc-1cmj4ml-0 p{margin-bottom:16px}}@media(min-width:2560px){.kZQexU .sc-1cmj4ml-0 p{margin-bottom:12px}}@media(min-width:1000px){.kFNaRc .sc-qvufca-1{padding:0 16px}}.fzuCgM{overflow:hidden;height:0;color:transparent}.fmcHss{max-width:100%;margin:0 0 20px}.fmcHss.sticky{position:sticky;top:16px}.hlxBlR{min-height:600px}.hlxBlR #mpu1,.hlxBlR #sidebar1{position:sticky;top:16px}.MxpAk{min-height:250px}.clQXMC{max-width:100%}.eEtnsS{margin:0 0 6px;color:#646464;color:light-dark(#646464,#bdbdbd);font-family:'Indy Sans','Indy Sans Fallback',sans-serif;font-size:15px}.PbXHI{margin:0 0 12px}.hVucHy{height:380px}.pAheK{width:100%;height:51px}.lgmjvx{margin-bottom:16px;border-bottom:1px solid #919191;border-bottom:1px solid light-dark(#919191,#646464)}.gSAEA-d{margin-bottom:16px}.gSAEA-d [role='listitem']{position:relative;margin-bottom:12px;border-bottom:1px solid #d3d3d3;border-bottom:1px solid light-dark(#d3d3d3,#919191)}.gSAEA-d [role='listitem'] .sc-u4n1j-0{display:flex;position:absolute;bottom:16px;left:10px;width:32px;height:32px;align-items:center;justify-content:center;border-radius:50%;background-color:#ec1a2e;background-color:light-dark(#ec1a2e,#ec1a2e)}.gSAEA-d [role='listitem'] .sc-u4n1j-0>svg{width:90%;fill:#fff;fill:light-dark(#fff,#000);stroke:transparent}.gSAEA-d [role='listitem']:first-child{display:block;padding-bottom:0;margin-bottom:12px}.gSAEA-d [role='listitem']:first-child .sc-u4n1j-0{top:-15px;bottom:auto;left:12px}.gSAEA-d [role='listitem']:first-child>*:first-child{display:block;width:100%;height:205px}.gSAEA-d [role='listitem']:first-child>*:last-child{--content-bg:#222;--content-bg-opaque:rgba(34,34,34,0.7);position:absolute;bottom:0;width:100%;padding:28px 12px 12px;background:linear-gradient(to top,var(--content-bg) 70%,var(--content-bg-opaque) 100%) no-repeat;color:#fff;color:light-dark(#fff,#222);font-size:17px;font-weight:bold}.gSAEA-d [role='listitem']:last-child{margin-bottom:0;border-bottom:0 none}@supports(color:light-dark(red,red)){.gSAEA-d [role='listitem']:first-child>*:last-child{--content-bg:light-dark(#222,#222)}}@supports(color:light-dark(red,red)){.gSAEA-d [role='listitem']:first-child>*:last-child{--content-bg-opaque:light-dark(rgba(34,34,34,0.7),rgba(34,34,34,0.7))}}.fgtiQY{min-height:1924px}@media(max-width:767px){.fgtiQY{display:none}}.eqQkhO{width:308px;height:100%;margin-left:auto}.eqQkhO.hidden{display:none}@media(max-width:999px){.eqQkhO{display:none}}.article-liveblog .dzfINj{background-color:#f7f7f7;background-color:light-dark(#f7f7f7,#222)}.jBkNwU{justify-content:center}.cumEve{justify-content:center}@keyframes hqVOOe1548920386{from{transform:translateX(0)}to{transform:translateX(-100%)}}@keyframes bReFEb1548920386{from{transform:translateX(100%)}to{transform:translateX(0)}}
Stay up to date with notifications from The Independent Notifications can be managed in browser preferences.
Not now Yes please
News Science People infected with Omicron unlikely to catch BA.2 shortly afterward, study suggests Reinfections of BA.2 disproportionately affect unvaccinated people, researchers say
Samuel Lovett Science Correspondent
Tuesday 22 February 2022 17:27 GMT
Your support helps us to tell the story From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.
At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.
The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.
Your support makes all the difference. Read more Reinfections from the sub-variant BA.2 can occur shortly after a person has caught Omicron but are rare, new research suggests.
The study, which looked at 47 cases of BA.2 infection that came shortly after an Omicron infection, found that this phenomenon disproportionately affects unvaccinated people.
BA.2 is a spin-off from the Omicron variant, known as BA.1, but appears to be 1.5 times more infectious than its predecessor and is on course to become dominant in the UK. However, scientists have said there is no indication that BA.2 is more deadly or better at evading immunity than Omicron.
Now, researchers from Denmark have highlighted how, out of 1.8 million cases reported between 21 November 2021 and 11 February 2022, just 1,739 fulfilled the criteria of two positive samples separated by 20 to 60 days.
Of these, 263 paired samples were randomly selected and analysed. The research found 187 (71 per cent) cases of reinfections, 47 (18 per cent) of which were BA.1-BA.2 reinfections.
“The reinfection rate appears to be low given the high 258 number of positive Sars-CoV-2 tests during the study period,” the authors wrote.
Out of the 47 cases, 42 were unvaccinated (89 per cent), suggesting people who have not been jabbed are more likely to catch BA.2 shortly after a BA.1 infection.
Many of these reinfections were observed in people under the age of 30, the researchers said.
Reinfections were characterised by overall mild symptoms comparable to the initial infection and did not lead to hospitalisation or death, according to the study.
“It is, however, striking that mainly children and adolescents become reinfected, since children to a higher degree than adults develop a sustained cross-reactive immunity,” the authors note.
“This may be explained by the very high incidences among children in the chosen study period, whereas adults and elderly had lower incidences.”
The study has not yet been peer-reviewed and comes as BA.2 continues to spread across multiple countries.
In the US, the Omicron sub-variant has now been detected in more than 30 states, makes up around 3.9 per cent of new infections, and appears to be doubling quickly, according to the Centers for Disease Control and Prevention’s data tracker.
“If it doubles again to 8 per cent, that means we’re into the exponential growth phase and we may be staring at another wave of Covid-19 coming in the US,” Samuel Scarpino, the manager director of pathogen surveillance at the Rockefeller Foundation, told NPR.
Thank you for registering Please refresh the page or navigate to another page on the site to be automatically logged in Please refresh your browser to be logged in
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies
Comments