two strains
made notables here 5 weeks ago…
>>8451833, >>8451890 two strains of COVID-19 type "L" and type "S"
oops forgot link
https://www.newscientist.com/article/2236544-coronavirus-are-there-two-strains-and-is-one-more-deadly/
https://www.dailymail.co.uk/health/article-8073543/TWO-strains-killer-coronavirus-spreading-study-claims.html