A medical research professor at Oxford University describes what can be done immediately:
I would prefer hydroxychloroquine to the use of mefloquine unless mefloquine is dramatically better. MQ can cause neuropsychiatric problems. In vitro experiments have shown that chloroquine and better hydroxychloroquine inhibit viral replication in cells but also can be preventative.
No-one is allowed to talk about this officially in Europe. Authorities either want to push the obscenely expensive antivirals or just spread the virus to get ‘herd immunity’. Problem is the virus is an RNA virus that has a mutation rate, meaning that conceivably one can be repeatedly infected by different strains of COVID.
The best strategy is social distancing, early mass testing with quarantines of contacts of proven infected cases, and early treatment with hydroxychloroquine or probably better a combination to minimise resistance formation.
The government should also push widely available antivirals, such as Vit C, Vit D3, zinc etc.