COVID-19 survivors may only need one vaccine dose, study finds

Researchers looked at blood samples of 10 people previously infected with coronavirus who received one shot of the Pfizer-BioNTech or Moderna vaccine COVID-19 survivors had boosted levels of immune system cells and a 1,000-fold increase in levels of neutralizing antibodies. The levels were enough to neutralize both the original strain of the virus and the South African variant that is more highly contagious. Dr Anthony Fauci said the data is 'impressive' and that - if it holds up - health officials may consider letting survivors get one dose