In March 2020, an infectious disease expert (professor and epidemiologist Michael Osterholm from the Univ. of Minnesota) was on the JRE podcast and said "Realistically, we're years out from a safe and effective vaccine." He referenced the Zika virus, which five years later still does not have a vaccine. "We can make a vaccine for the virus overnight, but the problem is we don't know how safe and effective it will be."
In March 2020, an infectious disease expert (professor and epidemiologist Michael Osterholm from the Univ. of Minnesota) was on the JRE podcast and said "Realistically, we're years out from a safe and effective vaccine." He referenced the Zika virus, which five years later still does not have a vaccine. "We can make a vaccine for the virus overnight, but the problem is we don't know how safe and effective it will be."
I follow Dr. Osterholm very closely as he's honest and doesn't beat around the bush with his comments. He has a regular podcast for those interested that is 100% COVID focused.
I listened to his interview on JRE a couple times now. He went on to say that, basically, even after a Phase 3 trial, you're just not going to have data for every age group, demographic, etc, to cover all your bases for side effects. It's certainly a trade-off that we are making to get to a vaccine to help the most people as quickly as possible, while being as safe as we can.
You should check out his more recent material, he is actually much more confident in an earlier vaccine now. He is the director of CIDRAP at the University of Minnesota, and does a weekly podcast. I highly recommend the podcast, as he stays factual and scientific, and tries to keep out of wading into the politics.
I second this. I follow Dr Osterholm fairly closely. He’s very transparent and doesn’t beat around the bush. Like many studying the virus, his views have changed as he learned more. In fact, in that JRE episode, he kind of poo-pops the mask idea. Of course he’s changed his views on that since then.