SWITZERLAND-HEALTH-VIRUS-WHO-LONGCOVID-DIAZ

World Health Organization's head of clinical care at the health emergencies programme Janet Diaz answers questions during an interview with AFP, on January 29, 2021, in Geneva. - It is time to start solving the mystery of Long Covid, an aspect of the pandemic blighting millions of lives, the World Health Organization's leader on post-Covid conditions told AFP. Little is known about why some people, after coming through the acute phase of Covid-19, struggle to recover and suffer ongoing symptoms including tiredness, brain fog, cardiac and neurological disorders. (Photo by Fabrice COFFRINI / AFP) (Photo by FABRICE COFFRINI/AFP via Getty Images)