Clinical trial to investigate whether vitamin D protects against COVID-19

CORONAVIT will run for six months and involve more than 5,000 people to find out whether a ‘test-and-treat’ approach to correct people’s vitamin D deficiency during winter will reduce the risk and/or severity of COVID-19 and other acute respiratory infections.

People will take part in the study from their homes, without any face-to-face visits needed, as all vitamin D tests and supplements will be sent via the post. Any UK resident aged 16 or more can participate if they are not already taking high-dose vitamin D. To register interest, people can contact the study team on [email protected].

https://www.qmul.ac.uk/media/news/20...-covid-19.html

Of course, if you're taking part in a trial you'd probably have to follow the instructions of scientists and do exactly what you're told without modifying the instructions because you thought you knew better, so that might rule out some people who post on this forum.