$MRNA из статьи CNBC Why we should think of the Covid vaccine ‘like a tetanus shot,’ according to NIH director “RNA viruses change over time ... that original Wuhan virus, you can’t find that one anymore because it picked up another mutation on the way to New York, and what’s replaced it is something more contagious,” Collins said. “That’s how this works.” As a result of Covid’s mutations, Collins said that it is possible that the population may need an updated version of the vaccine in a few more years, and to think of the current vaccine “more like your tetanus shot where you need a booster now and then as opposed to something you do it once and you’re done.” По сути, настроен оптимистично по вакцинам файзера и модерны, считает необходимым проведение повторной вакцинации спустя некоторое время.