A timeline of Covid-19 as the number of confirmed cases increases around the world.
A pilot of study in India has identified a possible reason why men suffer worse effects when infected with the novel coronavirus - and it may reveal a painful truth for men.
The study, which tracked the clearance of the virus from patients in Mumbai, focused on the body's angiotensinconverting enzyme 2 (ACE2) cells.
These receptors bind to the coronavirus and are found in large amounts in the lungs, heart and gut in both men and women.
All of those areas have been found to be vulnerable to 2019-nCoV, the virus that causes Covid-19.
Co-author of the study, Dr Aditi Shastri, told the Los Angeles Times that if the coronavirus is found in the testes, that might mean the virus can be sexually transmitted.
"I would definitely consider that virus could be secreted into seminal fluid," she said.
Dr Kathryn Sandberg of Georgetown University, who studies gender differences in immune response, told the Los Angles Times that women are known to fight viruses better than men, partly because their immune systems have a stronger initial response to exposure.
Sandberg said the theory that coronavirus could be idle in the testes is "speculative".
But she added that "it's worth pointing out to people who have forgotten that ACE2 is in the testes, and could be a player".
