17% of the respondents in the survey are worried about the alleged long-term side effects of the vaccines. Researchers have found that there are a few rare but severe side effects from COVID-19 vaccination. These include thrombosis with thrombocytopenia syndrome which is a condition in which a person experiences blood clotting as well as low platelet count; Guillain-Barré syndrome in which the immune system attacks the peripheral nervous system; and Myocarditis which is an inflammation of the heart.