A couch potato took part in experiment on boosting immunity - and when he got Covid, it saved him

The Truth About... Boosting Your Immune System, which airs on Wednesday, features six volunteers who undergo a six-week crash course designed to turn around their immune systems. https://www.dailymail.co.uk/health/article-9106357/A-couch-potato-took-experiment-boosting-immunity-got-Covid-saved-him.html?ns_mchannel=rss&ns_campaign=1490&ito=1490