Hydroxychloroquine: The Indians worried over export of unproven 'corona drug' to US

There is no proof that hydroxychloroquine (commonly known as HCQ) is effective in treating Covid-19, but Mr Trump has called it a "game-changer" in the fight against coronavirus.

An anti-malaria drug, it's also routinely prescribed for autoimmune disorders like rheumatoid arthritis and lupus - John Hopkins Lupus Centre has described it as a sort of "lupus life insurance" - and is taken by thousands of Indians daily.

But now with all the hype around it, patients in India have looked on anxiously for the past fortnight as hydroxychloroquine has been disappearing from the shelves in chemist stores.