RIO DE JANEIRO, BRAZIL - Pfizer's insistence on the need for a 3rd dose to protect against the Covid-19 Delta variant was the focus of attention on Wednesday (28) in the Americas, a continent totaling 76.3 million infections and close to 2 million deaths, according to the World Health Organization (WHO).
This and 5 other facts about the coronavirus in the Americas this week:
PFIZER CLAIMS 5 TO 11 TIMES MORE PROTECTION AGAINST DELTA VARIANT
U.S. pharmaceutical Pfizer assured that a 3rd dose of its anti-Covid vaccine produces 5 times higher levels . . .