Some people have 'superhuman' ability to fight off COVID-19 after infection and vaccination

After both a prior COVID-19 infection and two doses of Pfizer or Moderna's vaccine, some people's immune systems develop an incredible ability to respond to the virus. Researchers call this'superhuman immunity' or'hybrid immunity' - these patients' immune systems can produce a lot of antibodies able to respond to different variants, as documented in multiple studies in recent months. In one study, patients with this'hybrid immunity' demonstrated the ability to respond to current variants of concern, non-human coronaviruses, and potentially even new variants that don't yet exist. Scientists are studying these patients to better understand Covid immunity - and immunity against other viruses. After both a past Covid infection and vaccination, patients may have'superhuman immunity' against the coronavirus, studies suggest.