Vaccine ingredients can look unfamiliar when they are listed on a label. However, many of the components used in vaccines occur naturally in the body, in the environment, and in the foods we eat. All of the ingredients in vaccines – as well as the vaccines themselves - are thoroughly tested and monitored to ensure they are safe.

2024年10月8日 · While COVID-19 vaccines are highly effective against serious disease and death, no vaccine is 100% effective. Vaccinated people can get infected and may fall ill with COVID-19. This is known as a ‘breakthrough infection’ or ‘breakthrough case’. Breakthrough infections can happen with any vaccine and do not mean that the vaccine does not ...

WHO’s COVID-19 dashboard also features the number of vaccine doses administered globally, with more detail provided on the dedicated COVID-19 vaccination dashboard. At a regional level, there is an AFRO COVID-19 vaccines dashboard and a …

2025年3月28日 · When you get a vaccine, your immune system responds. We now have vaccines to prevent more than 20 life-threatening diseases, helping people of all ages live longer, healthier lives. Immunization currently prevents 3.5 million to 5 million deaths every year from diseases like diphtheria, tetanus, pertussis, influenza and measles.

2020年12月8日 · Regardless of whether the vaccine is made up of the antigen itself or the blueprint so that the body will produce the antigen, this weakened version will not cause the disease in the person receiving the vaccine, but it will prompt their immune system to respond much as it would have on its first reaction to the actual pathogen.

2020年6月27日 · When you get a vaccine, your immune system responds. We now have vaccines to prevent more than 20 life-threatening diseases, helping people of all ages live longer, healthier lives. Immunization currently prevents 3.5 million to 5 million deaths every year from diseases like diphtheria, tetanus, pertussis, influenza and measles.

2024年10月8日 · Unprecedented scientific collaborations, extensive prior research and substantial public funding enabled swift COVID-19 vaccine development to be completed in record time – while maintaining high safety standards. New versions of the vaccine are being developed as the COVID-19 virus continues to circulate and change.

2021年7月14日 · Vaccine effectiveness is a measure of how well vaccines work in the real world. Clinical trials include a wide range of people – a broad age range, both sexes, different ethnicities and those with known medical conditions – but they cannot be a perfect representation of the whole population.

2025年3月26日 · Vaccination is one of the best ways to prevent diseases. Over the past 50 years, essential vaccines saved at least 154 million lives (1). During the same period, vaccination has reduced infant deaths by 40%. Together with governments, vaccine manufacturers, scientists and medical experts, WHO's vaccine safety programme is constantly helping monitor the safety of …

2025年2月28日 · The World Health Organization (WHO) today announced the recommendations for the viral composition of influenza vaccines for the 2025–2026 influenza season in the northern hemisphere. The announcement was made at an information session at the end of a 4-day meeting on the Composition of Influenza Virus Vaccines, a meeting that is held twice annually.