先看看英國官方發布的數據。到8月下旬,英國居民中約93%有了新冠抗體。有些來自自然感染,更多的來自疫苗。
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An estimated 93.6% of the adult population in England, 91.2% in Wales, 91.9% in Northern Ireland and 93.3% in Scotland tested positive for COVID-19 antibodies in the week beginning 23 August 2021. The presence of antibodies suggests a person previously had COVID-19 or has been vaccinated.
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按照一年多前的說法,當居民中有70%以上有抗體時,即可達到群免,能夠控製疫情了。
可事實證明,快速增殖傳播的delta變種,打破了群免的幻想。
下圖顯示,自八月以來,每日新冠病例數一直在增加。
值得一提的是,病死率遠遠低於前幾波。
如果有了新藥、或新療法,病死率進一步降低,大家也許不在乎啥“陽性”了。
美國的數據也類似
CDC Finds Over 83 Percent of Americans Had COVID Antibodies Before Delta Surge
https://www.newsweek.com/cdc-over-83-percent-americans-covid-antibodies-before-delta-surge-1625738
別指望群免啦,靠免疫別人來保護自己。
還得靠自己打疫苗,減少染病後的病死率。因為有充分數據證明:沒打疫苗的,病死率比打了的高11.3倍。
重點:加強個人防護,有病及時就醫。