The vaccines subsequently get to work stimulating the immune system so it can memorize the virus’s blueprint and mount a quick response if it encounters the real thing later. The mRNA molecules used in the Pfizer and Moderna vaccines are especially fragile, he notes, so “they are out of your body in a day or so.” Unlike medicines that people take every day or week, vaccines are generally administered once or a handful of times over a lifetime. Food and Drug Administration.Ī key reason for this limited window of side effects is the short time all vaccines stay in the body, says Onyema Ogbuagu, an infectious diseases specialist at Yale Medicine and a principal investigator of the Pfizer-BioNTech COVID-19 vaccine trial. “The concerns that something will spring up later with the COVID-19 vaccines are not impossible, but based on what we know, they aren’t likely,” adds Miles Braun, adjunct professor of medicine at the Georgetown University School of Medicine and the former director of the division of epidemiology at the U.S. He adds that the longest time before a side effect appeared for any type of shot has been six weeks. “Side-effects nearly always occur within a couple of weeks of a person being vaccinated,” says John Grabenstein, director of scientific communication for the Immunization Action Coalition. This picture fits with the modern history of vaccinations, which shows that most new immunizations have been incredibly safe, and even the most severe effects have reared their ugly heads right away. What’s more, all these and other side effects appear soon after someone has taken the vaccine, suggesting that people don’t need to worry about delayed long-term reactions. So far, incidents of severe side effects for the coronavirus vaccines such as Guillain-Barré Syndrome and heart inflammation are very rare, and they were discovered quickly because they were on official lists of potential problems to watch for. But more than a hundred million Americans have already passed that point in their vaccinations and the first participants in the clinical trials are now beyond a year. It’s true that reports of new side effects can sometimes take months to emerge as a vaccine goes from populations of thousands in clinical trials to millions in the real world, encountering natural variations in human responses along the way. The main two reasons cited for this hesitancy are that the vaccines are “too new” and that they may trigger unexpected or life-threatening side effects, perhaps even months or years later. Young adults ages 18 to 29 and Black and Hispanic people are some of the most likely to voice this sentiment. began administering COVID-19 vaccines, the latest figures from the nonprofit Kaiser Family Foundation’s ongoing tracking poll show that 10 percent of adults are still nervous about the vaccine and want to “wait and see” how others fare before rolling up their sleeves.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |