In this week's RAZOR special we cover a range of COVID-19 related stories.

Phylogenetic analysis is a way of understanding the evolutionary history of an organism. Since the beginning of the pandemic, researchers all over the world have been using it to trace the origins of SARS-CoV-2, the virus that causes COVID-19.

When COVID-19 first entered our lives, we told there was a 7-14 day recovery time for people with milder symptoms. But the list of symptoms and complications is growing, with some trapped at home suffering weeks of fluctuating illness.

There has been a surge in people volunteering during the pandemic. In the UK, for example, it's on a scale not seen since the second world war. Nearly a million people have offered their time and skills to support the National Health Service. Clinical engineers are often thought of as "back room types". But during the crisis many of them found themselves right on the frontline. Shini Somara speaks to one of the volunteers.

While we wait for a vaccine, laboratories all over the world are trying to bridge the gap by developing antiviral therapies that they hope will rapidly treat the symptoms of COVID-19. Emma Keeling speaks to Professor Yvonne Maldonado and began by asking why people suffer from so many different symptoms and complications.