Getting sick with COVID-19 can offer some protection from future illness, sometimes called “natural immunity,” but the level of protection people get from having COVID-19 may vary depending on how mild or severe their illness was, the time since their infection, and their age. One study showed that, for people who already had COVID-19, those who do not get vaccinated after their recovery are more than 2 times as likely to get COVID-19 again than those who get fully vaccinated after their recovery.Īll COVID-19 vaccines currently available in the United States are effective at preventing COVID-19. Getting a COVID-19 vaccine gives most people a high level of protection against COVID-19 and can provide added protection for people who already had COVID-19. Learn more about what ingredients are and are not in Pfizer-BioNTech, Moderna, Novavax, or Johnson & Johnson/Janssen COVID-19 vaccines.ĬOVID-19 vaccination causes a more predictable immune response than infection with the virus that causes COVID-19. This process is a part of normal body functioning.ĬOVID-19 vaccines do NOT contain ingredients like preservatives, tissues (like aborted fetal cells), antibiotics, food proteins, medicines, latex, or metals. After the body produces an immune response, it discards all the vaccine ingredients just as it would discard any information that cells no longer need. This response helps protect you from getting sick with COVID-19 in the future. The Novavax COVID-19 vaccine includes harmless pieces (proteins) of the virus that causes COVID-19 they are pieces of what is often called the “spike protein.” These give instructions to cells in your body to create an immune response. Pfizer-BioNTech and Moderna COVID-19 vaccines also contain messenger RNA (mRNA) and the Johnson & Johnson/Janssen COVID-19 vaccine contains a harmless version of a virus unrelated to the virus that causes COVID-19. Exact vaccine ingredients vary by manufacturer.
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