22 Jul 2023 12:34 am
Seriously what risks? https://www.gavi.org/vaccineswork/vacci ... QqEALw_wcB
Vaccines go through a rigorous process of testing before they are used in the general population. Once researchers have found a promising candidate, they put it through pre-clinical studies, usually testing it on animals to assess its safety and potential to prevent disease. If a vaccine passes that test, it goes into phase 1 trials, where it is given to a small group of people to confirm its safety in humans, to see if it triggers an immune response and to figure out the dosage. In phase 2 trials, the vaccine is given to a larger group (usually hundreds) of volunteers to see whether the immune response triggered is strong enough, and whether there are any side effects. In this phase, the volunteers are divided into two groups, one which gets the vaccine and one which gets a placebo. In phase 3 trials, the vaccine candidate is given to thousands of volunteers, again divided in two groups as for phase 2 trials. During public health emergencies, such as COVID-19, when no licensed vaccine or treatment exists, vaccine candidates may be licensed for emergency use, if they have made it to the end or nearly the end of phase 3 trials and the evidence suggests they are safe and effective. Even after a vaccine has been approved and rolled-out into the general public, it is monitored very closely for a
Vaccines go through a rigorous process of testing before they are used in the general population. Once researchers have found a promising candidate, they put it through pre-clinical studies, usually testing it on animals to assess its safety and potential to prevent disease. If a vaccine passes that test, it goes into phase 1 trials, where it is given to a small group of people to confirm its safety in humans, to see if it triggers an immune response and to figure out the dosage. In phase 2 trials, the vaccine is given to a larger group (usually hundreds) of volunteers to see whether the immune response triggered is strong enough, and whether there are any side effects. In this phase, the volunteers are divided into two groups, one which gets the vaccine and one which gets a placebo. In phase 3 trials, the vaccine candidate is given to thousands of volunteers, again divided in two groups as for phase 2 trials. During public health emergencies, such as COVID-19, when no licensed vaccine or treatment exists, vaccine candidates may be licensed for emergency use, if they have made it to the end or nearly the end of phase 3 trials and the evidence suggests they are safe and effective. Even after a vaccine has been approved and rolled-out into the general public, it is monitored very closely for a