John Hollis didn’t realise he’d been contaminated with Covid-19. But he later found he’s one of many uncommon individuals who has “super antibodies”.
The antibodies are so good at killing the virus, he’s virtually proof against the illness.
Still, if scientists hope to search out others like John, they’ll need to deal with lengthy standing distrust among the many African-American neighborhood.
Produced by the BBC’s Chelsea Bailey and Rod Macleod.