By Natalie Rahhal Us Health Editor
Published: 01:55 BST, 19 September 2020 | Updated: 01:55 BST, 19 September 2020
As much as half of the world's population may have some immunty to coronavirus, a small but growing body of research suggests.
Tests done on donated blood in the US found that about 50 percent of the samples had immune T cells that reacted to coronavirus, suggesting that the donors' bodies might have the natural ability to fight of the deadly virus.
Similar results have been found in the UK and Sweden.
COVID-19 is thought to be so deadly in part because it's an entirely new virus to which humans have no natural immunity.
And while that is clearly the case for many people, British Medical Journal associate editor Dr Peter Dosh wrote on Thursday that the evidence is beginning to suggest that some people may possess some protection against the virus.
Some people may have immune T cells to other coronaviruses that could fight SARS-CoV-2, recent research suggests
In March, a member of a Skagit County, Washington choir went to their usual practice, feeling a bit ill, but unaware that they had coronavirus.
Within a week, that person and another had tested positive for the virus that causes COVID-19. Another 25 members of the 122-person choir had symptoms of coronavirus.
In the weeks that followed, 52 of the other 60