A number of studies have shown that in addition to helping to protect pregnant people from flu, a flu vaccine given during pregnancy helps protect the baby from flu for several months after birth, when babies are too young to be vaccinated.A 2018 study showed that getting a flu shot reduced a pregnant person’s risk of being hospitalized with flu by an average of 40% from 2010-2016.A 2013 study showed that during the 2010–20–2012 flu seasons vaccination reduced the risk of flu-associated acute respiratory infection in pregnant people by about one-half.Flu vaccination during pregnancy helps protect pregnant people from flu during and after pregnancy and helps protect their infants from flu in their first few months of life.Among people with diabetes and chronic lung disease ,flu vaccination has been shown in separate studies to be associated with reduced hospitalizations from a worsening of their chronic condition.Flu vaccination can reduce the risk of a flu-related worsening of chronic lung disease (for example, chronic obstructive pulmonary disease ( COPD ) requiring hospitalization).Flu vaccination has been associated with lower rates of some cardiac events among people with heart disease, especially among those who have had a cardiac event in the past year.Flu vaccination is an important preventive tool for people with certain chronic health conditions.A 2014 study showed that flu vaccination reduced children’s risk of flu-related pediatric intensive care unit (PICU) admission by 74% during flu seasons from 2010-2012.A 2017 study found that during 2009-2016, flu vaccines reduced the risk of flu-associated hospitalization among older adults by about 40% on average.A 2018 study showed that from 2012 to 2015, flu vaccination among adults reduced the risk of being admitted to an ICU with flu by 82%.For example, during 2019-2020 flu vaccination prevented an estimated 105,000 flu-related hospitalizations. Flu vaccine prevents tens of thousands of hospitalizations each year.Flu vaccination can reduce the risk of flu-associated hospitalization.Among adults in the ICU with flu, vaccinated patients on average spent four fewer days in the hospital than those who were not vaccinated. A 2018 study showed that among adults hospitalized with flu, vaccinated patients were 59% less likely to be admitted to the ICU than those who had not been vaccinated.A 2021 study showed that among adults hospitalized with flu, vaccinated patients had a 26% lower risk of intensive care unit (ICU) admission and a 31% lower risk of death from flu compared with those who were unvaccinated.Flu vaccination has been shown in several studies to reduce severity of illness in people who get vaccinated but still get sick.During seasons when flu vaccine viruses are similar to circulating flu viruses, flu vaccine has been shown to reduce the risk of having to go to the doctor with flu by 40% to 60%.For example, during 2019-2020, the last flu season prior to the COVID-19 pandemic, flu vaccination prevented an estimated 7.5 million influenza illnesses, 3.7 million influenza-associated medical visits, 105,000 influenza-associated hospitalizations, and 6,300 influenza-associated deaths. Flu vaccine prevents millions of illnesses and flu-related doctor’s visits each year.Flu vaccination can keep you from getting sick with flu.Below is a summary of the benefits of flu vaccination and selected scientific studies that support these benefits.
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