4 ms·
A placebo doesn't have to be inert, it's more that it has to have no therapeutic value. Meningitis vaccine doesn't protect against covid so it's an effective pl
by bragr 5y ago
A placebo doesn't have to be inert, it's more that it has to have no therapeutic value. Meningitis vaccine doesn't protect against covid so it's an effective placebo for testing covid vaccine for example.