What are the stages in the development of a covid-19 vaccine? 1.Firstly, a replacement vaccine candidate has to pass testing on animals. 2.Following which clinical trials is the next step. 3.Then, over three phases, the vaccine candidate’s safety and efficacy are tested. 4. A fourth stage involves and analysis of post-marketing data. Pre-clinical tests During this primary stage, scientists test the vaccine on animals like mice or monkeys to ascertain if it produces an immune reaction. Phase I trials This is often the primary step where the experimental vaccine is given to humans, usually between 20-80 subjects , to check safety and dosage and check whether it stimulates the system and produce antibodies. Aim • How much of the drug is safe to give • What the side effects are • If the treatment helps Phase II trials During this stage, a bigger group of several hundred individuals are enrolled for...
Written by - Riya Verma