Vaccination is the administration of a vaccine to help the immune system develop immunity from a disease. Vaccines contain a microorganism or virus in a weakened, live or killed state, or proteins or toxins from the organism. In stimulating the body's adaptive immunity, they help prevent sickness from an infectious disease. When a sufficiently large percentage of a population has been vaccinated, herd immunity results. Herd immunity protects those who may be immunocompromised and cannot get a vaccine because even a weakened version would harm them. The effectiveness of vaccination has been widely studied and verified. Vaccination is the most effective method of preventing infectious diseases; widespread immunity due to vaccination is largely responsible for the worldwide eradication of smallpox and the elimination of diseases such as polio and tetanus from much of the world.

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US vaccination decline continues: 250,000 kindergarteners vulnerable to measles

An interdisciplinary research team from the University of Basel and the University Hospital Basel has studied the effects of the Covid-19 booster vaccination on the heart muscle. According to their findings, which have not yet been peer-reviewed, mild damage is more common than previously thought.

New Research Links COVID-19 Infection – and Vaccination – to a Debilitating Heart Condition

Scientists Uncover a Surprising New Benefit of Flu Vaccination

Bird flu vaccination may be the only way to have free-range chickens

COVID-19 vaccination protects people with blood cancer

New Research Reveals What Happens to Immune Cells After Vaccination

Global Partners May End Broad Covid Vaccination Effort in Developing Countries

Researchers Shed Light on Blood-Clotting After COVID-19 Vaccination

Unexpected Result: COVID-19 Vaccination Improves Effectiveness of Cancer Treatment

Almost Twice as Many Republicans Died From COVID Before the Midterms Than Democrats | The authors of a new study can’t say if this impacted the midterms, but say that it’s “plausible given just how stark the differences in vaccination rates have been, among Democrats and Republicans.”

This Cancer Treatment Actually Works Better After COVID Vaccination

COVID vaccination improves effectiveness of cancer treatment, study finds

Moral values explain differences in COVID-19 vaccination rates

We estimate substantially higher excess death rates for registered Reps VS registered Dems. The gap in excess death rates between Reps and Dems is concentrated in counties with low vaccination rates. These results materializes after vaccines became widely available.

Very low incidence of severe COVID-19 following vaccination and booster, large study reports

Moral values explain differences in COVID-19 vaccination rates across US counties

COVID-19 vaccination rates at NYC schools varied significantly by race/ethnicity and borough

Disproportionately focusing vaccination efforts on the least advantaged populations benefits everyone

New study provides insights into each US state's COVID-19 vaccination rate