Is there a reason the entire country is not on this if it proves effective?
They are not without their issues - heart arrhythmias, for one.
Same reason we are not all wearing masks - we dont have enough for everybody
I thought it was understood that the combination of Hydroxychloroquine (plaquenil) and Azithromycin was given once the person was tested positive for the infection. It is not a vaccine. It won't prevent a person from getting infected. Treating the entire population of people who are not infected would be a huge waste. And stupid.