RT @DrDenaGrayson
⚠️Worrisome. After 44%-66% of people in Manaus #Brazil got the #coronavirus in May-August, the death toll plummeted, likely due to herd immunity.

Deaths are now rising.

Antibodies waned after just a few months, potentially explaining the resurgence.

https://www.reuters.com/article/us-health-coronavirus-brazil-manaus-idCAKBN26I0I4