Dr. Huerta: Faced with covid-19 variants, act as if you had not been vaccinated | Video

Dr. Elmer Huerta, oncologist and specialist in Public Health, explains that the variants of covid-19 have altered the situation of the pandemic and the effectiveness of vaccines, which took months of development. The CNN collaborator also comments that it is not only that the vaccines developed in China are not effective against the South African variant, but that this scenario can occur for any biological.