> Trials often last a year or more and involve several thousand patients. Agreed. Though not all last a year, and the COVID trials had large numbers of volunt

> Trials often last a year or more and involve several thousand patients. Agreed. Though not all last a year, and the COVID trials had large numbers of volunteers. I defer to someone that works in the industry to say whether vaccine trials last longer than regular medicine (e.g. Parkinsons or Alzheimers drugs). But I suspect that vaccines need less time for trials because vaccines are made using standardised processes that are tweaked to produce the expected responses, vs. novel drugs that have never been synthesized before. This one [0] in the UK famously went wrong: "The German company that developed the drug hoped it would revolutionise treatment of leukaemia and rheumatoid arthritis. But within minutes of having the drug administered, all of the test subjects began feeling unwell." 0. https://www.bbc.co.uk/news/magazine-35766627#:~:text=When%20Rob%20Oldfield%20signed%20up,men%20fighting%20for%20their%20lives https://www.bbc.co.uk/news/magazine-35766627#:~:text=When%20....