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And even two people who get the exact same vaccine may have totally different reactions, for a range of reasons including age, sex, health and immunization history, and other factors that ...
Only a small number of vaccines use technology that contain live virus which can theoretically infect others. With the exception of the oral polio vaccine (OPV), there have been no documented cases of vaccine-induced viral shedding that has infected contacts of a person vaccinated with an attenuated (live-virus) vaccine. [15]
A US study conducted in January 2021 found that trust in science and scientists was strongly correlated with likelihood to get vaccinated for COVID-19 among those who had not already gotten vaccinated. [153] In March 2021, 19% of US adults claimed to have been vaccinated while 50% announced plans to get vaccinated. [154] [155]
Indeed, vaccines, including the influenza vaccine, Tdap, and pneumococcal vaccines, are less effective in adults over the age of 65. [ 28 ] [ 29 ] Nevertheless, the CDC recommends that elderly adults get the flu vaccine because influenza infection is particularly dangerous in this population and vaccine provides at least a moderate level of ...
As well, the more we give the virus an opportunity to go into naive hosts, meaning people who don't have immunity from either the vaccine or natural immunity from having had COVID in the past, the ...
Despite the power of Covid-19 vaccines in cutting the risk of hospitalization and death from the disease, fully vaccinated people can get very sick and die from the virus in rare cases. Those ...
Until the 1880s vaccine/vaccination referred only to smallpox, but Louis Pasteur developed immunization methods for chicken cholera and anthrax in animals and for human rabies, and suggested that the terms vaccine/vaccination should be extended to cover the new procedures. This can cause confusion if care is not taken to specify which vaccine ...
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