The Pfizer COVID-19 vaccine might have led to less side effectsbecause the company chose a smaller dose of its vaccine. Side effects may affect your child’s ability to do daily activities, but they should go away in a few days. COVID Coronavirus (COVID-19) vaccines side effects and safety - NHS “Our genetic data confirm that blood group O is associated with a risk of acquiring Covid-19 that was lower than that in non-O blood groups, whereas blood group A was associated with a higher risk than non-A blood groups,” researchers concluded. Typical side effects include pain at the injection site, fever, fatigue, headache, muscle pain, chills and diarrhoea. Most side effects show within a day or two after being vaccinated. Can side-effects of the vaccine cause blood clots and even death? For the Oxford/AstraZeneca vaccine (like the other vaccines), the vast majority of side effects that occur are mild and short-term. Do Your Vaccine Side Effects Predict How You'd React To COVID-19? The side effects listed below are not experienced by everyone who takes this medication. COVID Serious side effects of the Janssen/Johnson & Johnson COVID-19 vaccine can occur within three weeks of vaccination and require emergency care. Estimates I’ve seen are in the 3 to 10% range for patients admitted for other reasons," adds Dr. Chun. In some people, lasting health effects may include long-term breathing problems, heart complications, chronic kidney impairment, stroke … COVID vaccine for type 2 diabetes: safety, eligibility, side effects