To this day, we still know very little about what happens to people who are infected a second time with COVID-19. Are they partially or fully immunized? Does immunization take place in all age groups?
According to a new observational study involving more than 3,000 healthy individuals from the United States Marine Corps, most of whom were between the ages of 18 and 20, suggests that a past COVID-19 infection does not fully protect against reinfection in young people.