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Hiw many deaths from covid vaccine7/12/2023 ![]() Fourth doses, or second boosters, are most important for those at high risk of severe outcomes.Immunity against infection wanes over time, but can be boosted with a third or fourth dose of an mRNA vaccine. COVID vaccines are not always able to provide protection against infection by Omicron or one of its subvariants.A booster dose is recommended at 5 months after the second dose, and at least 3 months following infection with COVID-19, to increase the level of protection against severe outcomes. Two doses of a COVID vaccine dramatically reduce the risk of hospitalization or death, and a third dose will offer even more protection. The protection that vaccines provide against severe disease continues to be strong even many months after immunization.This occurs whether this immunity was generated by infection, vaccines, or both. Omicron has demonstrated increased transmissibility and capacity to evade the body’s immune response compared to previous versions of the virus.Omicron, along with its sub-variants, is the currently circulating variant of concern (VOC) in Alberta. These changes can cause the emergence of new “variants” of the original virus and may have different properties than the original virus, such as increased transmissibility or the ability to cause more severe disease. All viruses evolve over time through genetic variations.A large body of evidence suggests that vaccines are safe and effective against COVID-19.Number of adverse events following immunization (AEFI) by vaccine name reported in Alberta Note: The age group 5-11 year olds includes those who received the Pfizer-BioNTech Comirnaty pediatric COVID-19 vaccine and those who were eligible to receive the Pfizer-BioNTech Comirnaty COVID-19 vaccine because they were 11 but would turn 12 in 2021. ![]() ![]() Note 2: The age group 5-11 year olds includes those who received the Pfizer-BioNTech Comirnaty pediatric COVID-19 vaccine and those who were eligible to receive the Pfizer-BioNTech Comirnaty COVID-19 vaccine because they were 11 but would turn 12 in 2021. Note 1: individuals who received a first dose in one age category may cross into another age category for a second or third dose. ![]()
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