What are biomarkers & do they hold the key to predict COVID-19 severity? A collaborative study between SA, Kenya and London universities would also weigh up how COVID-19 presents in men compared to women. FILE: Blood samples from the SA National Blood Service. Picture: Kevin Brandt/EWN. 74 days ago CAPE TOWN - Researchers at a host of universities in South Africa and abroad are investigating whether biomarkers - biological molecules found in one's blood and other body fluids and tissues - can help preempt COVID-19 severity in patients. It's their latest bid to improve clinical outcomes for severely ill coronavirus patients in intensive care units.