The efficacy data for the J&J vaccine look absolutely wonderful. No apparent reduction in efficacy against the B.1.351 variant common in SA (?!). Numbers are small, but if confirmed, this is arguably today's most significant piece of news, and it's a one shot vaccine ... https://t.co/LAaOMHf1y7

— Prof Francois Balloux (@BallouxFrancois) February 24, 2021