Dr Siddarth Sridhar from HKUMed's Department of Microbiology discusses the controversial topic of ACE inhibitors' role in COVID-19 positive patients. Some scientists believe that taking ACE inhibitors might worsen the infection, while others suggest it might protect against severe cases. There is currently no definitive answer, but clinical trials are ongoing. Dr Sridhar advises patients to continue taking their ACE inhibitors for chronic medical conditions and consult their healthcare provider if they have any doubts.