TAMPA (NBC) – New research suggests people who already had COVID-19 may only need a single dose of the vaccine.
The University of Pennsylvania study looked at 44 patients who received one dose of the Pfizer or Moderna vaccine.
It showed people with a prior COVID-19 infection had already produced a strong immune response.
But those who never had the virus did not achieve full immunity until after their second dose.
Those who did already have COVID-19 also needed the second dose to protect against the South African variant but recovered COVID patients had enough antibody response after one dose.