Canada to have a possible candidate vaccine, can start testing as soon as summer if WHO approves.

Keep in mind that I am generalizing and may not be completely correct with some of these reasons. I may have missed something or misspoke or missed the mark. However For all the people wondering these things:

"Why so long to test?"

You have to realize making a vaccine that can do more good than harm is a tough thing. SARS didn't have a viable vaccine for 7 years. The fact that are able to start as early as summer is a very good thing and could possible be some of the quickest turn arounds for vaccine developments- as you can read in the article. Vaccines typically are a very tip-toe area. You may think you have a vaccine but it's simply stunted it a bit or may even have helped the virus.

"Why do they need WHOs permission?"

As I said while ago possible candidate vaccines can be dangerous, WHO has to approve of the vaccine because it may be dangerous. They need to look and study it to see if it will harm or hurt, then of course human testing is normally a very large ethic debate and going as far as human testing can be immoral if the vaccine is not approved.

"If the vaccine works, when will they be able to distribute it?"

As stated in the article, probably 10 to 18 months, maybe even earlier or maybe later. It depends on how the vaccine works and how quickly they can tell results.

Of course if there are people who are proving me wrong I will update this comment. I highly suggest you read the article, though. Not scam it, not glance at it. Read it. A large majority of questions are answered in the article.

/r/Coronavirus Thread Link - globalnews.ca