Yes there has been. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(21)00234-8/fulltext https://www.thelancet.com/journals/lancet/article/PIIS01

Yes there has been. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(21)00234-8/fulltext https://www.thelancet.com/journals/lancet/article/PIIS0140-6...