There is no doubt that acute #COVID19 can lead to short- and long-term sequelae, as does any other severe infection. Though, such low-quality studies with no control group, no denominator reported and no clarity over enrolment criteria are scientifically utterly useless. https://t.co/BYzNppfBlP

— Prof Francois Balloux (@BallouxFrancois) October 18, 2020