https://apnews.com/17ee0978ce839cf8e4f0cf20dc16198e > A study suggests that as many as one-third of Mexicans may have been exposed to the coronavirus by the end of last year. > Coronavirus antibodies were found in 33.5% of samples from blood banks and medical laboratory tests in Mexico unrelated to COVID-19. The random samples were taken between February and December 2020.