Dexamethasone, remdesivir, Regeneron: Trump's Covid treatment explained

The US president has been given a number of different medicines to attack coronavirus and calm the immune system. What are they, and why is he taking them?

Dexamethasone, remdesivir, Regeneron: Trump's Covid treatment explained
The US president has been given a number of different medicines to attack coronavirus and calm the immune system. What are they, and why is he taking them?