The appearance of the Delta variant of Covid-19 has worsened the situation in the United States, where about 100,000 new cases are registered every day. The Government insists that most of the most serious infections of the disease occur in people who have not been vaccinated. In Guatemala, the coronavirus has caused the overflow of hospitals and the exhaustion of medical personnel. While in Brazil, the Government is preparing to apply the booster vaccine to those over 70 years of age and immunosuppressed. .