COVID 19 VACCINES F Questions & Answers
How effective are the COVID vaccines? The phase 3 trials of both Pfizer and Moderna vaccines involved between 42,000 (Pfizer) and 30,000 (Moderna) people respectively. Pfizer vaccine is 95% effective and Moderna is 94.5% effective. How many shots of COVID 19 vaccines are needed? Both Pfizer and Modena’s COVID-19 vaccines currently in use in the USA need two shots to be effective. The interval between the two shots of Pfizer vaccine is 21days and that of Moderna is 28 days. What happens if I miss the second shot? Is a single shot still protective? Two shots are needed, and the second shot is required to attain immunity. Only 2 per cent of people in the trial missed their second dose so it isn’t entirely clear what happens under those circumstances. Are there any side effects? In the trial, both vaccines were generally well-tolerated, and an independent data monitoring committees reported no serious safety concerns. The most common side effects from the vaccines are: • Fatigue • Headache • Muscle aches Side effects occurred during the first week after vaccination, but were most likely one or two days after receipt of the vaccine. Side effects were more frequent following the second…