gilesgoat wrote:There's a difference, a vaccine 'trains' your immune system to a certain antibode response, an aspirin not.
Yep, but anti-malarials are not primarily anti-virals, they're anti-parasites, given that malaria is spread by parasites and not viruses. Anti-malarials generally aren't vaccines, either - Malarone certainly isn't, which is why you take a tablet every day and continue to do so on return.
Some anti-malarials, notably chloroquine, also have an antiviral effect; this is presumably why it was in the list of things that have been tested against this particular virus. And whilst there is some indication, in, as far as I can tell, one very small scale test, that it may have an effect in treating the virus, there's no indication of any prophylactic effect against it.
And Malarone doesn't contain chloroquine anyway.
In an unrelated note, certain other anti-malarials of the synthetic quinine type, which are unsurprisingly no longer used, have the amusing side effect of turning the patient red, blue, or yellow. Permanently.