@theconversation.com 3 years ago COVID vaccines: why second boosters are being offered to vulnerable people in the UK – but not young and healthy people yet
@rt.com 3 years ago UK study to test MIXED Covid vaccines on children & teens to determine best approach for 2nd doses
@theguardian.com 4 years ago Pfizer vaccine second dose has ‘sweet spot’ after eight weeks, UK scientists say