Hydroxychloroquine and azithromycin as treatment of Covid-19; results of a trial [pdf]

A physician friend of mine explained it: If you're desperate by overwhelming numbers of patients, and there's a drug that may work, you do a "study", which means you give it to some of the patients and afterwards publish a paper with numbers based on the data you collect.

Ie. some studies are motivated by battlefield desperation, not by scientific curiosity or someone's need for a publication.

I'll preface this with the statement that I am as far away as you can be from an antivaxxer. I do believe vaccines work, and that everyone should get their vaccines. Vaccines save lives and are safe.

However, I am a bit worried about a vaccine that is rushed to approval and use.

If the regular process to approve a vaccine takes years, I'm pretty confident that the vaccine is safe for 99.99% of the population. This is further verified by the sheer number of people getting the vaccine for years without adverse reactions (very rare cases excluded, like 1 in 100,000 or 1,000,000 rare.)

But what about a rushed nCoV vaccine? Wouldn't it be potentially more dangerous if it underwent weeks/a couple of months of testing for approval instead of the usual years? And if it wouldn't, then why do we require any other vaccine to undertake years of clinical trials before approving it then?

An other hypothesis I have (but can't verify, I don't know enough about how vaccines are made) is that the nCoV vaccine is basically another flu vaccine. We know how to make safe flu vaccines since most of the potential harm comes from the additives/preservatives in the vaccine (I might be wrong on that, please correct if that's not right.)

So, making a nCoV vaccine is basically the same additives/preservatives as the flu vaccine but with nCoV strains in it rather than the ordinary flu. And this way, the absence of danger is pretty well established already because the flu vaccine has been proved safe, the only question is whether the nCoV serum works or not. And thus, the only risk from a rushed vaccine is not that it is harmful but that it might not be reliably giving immunity.

Again, this is a guess from my rough understanding of how it all works. I'm posting this here hoping that someone much more knowledgeable than I am can chime in and clarify.

People with inflamed lungs caused by viral infection are at increased risk of bacterial pneumonia, so we need to know whether antibiotics are an effective prophylactic measure.