Why Do Adults Need Vaccines Beyond Childhood?
Many people assume vaccines are only for children, but the CDC recommends a series of immunizations throughout adulthood. Immunity from childhood vaccines can wane over time, leaving you vulnerable to diseases like tetanus, diphtheria, and pertussis. Additionally, new vaccines are developed for adults, such as the shingles vaccine and the HPV vaccine for adults up to age 45.
As we age, our immune system naturally weakens, making us more susceptible to infections. Seasonal flu, pneumococcal disease, and COVID-19 pose greater risks for older adults. Vaccination is a proven, low-cost way to reduce your risk of serious illness, hospitalization, and even death. According to CDC estimates, adult vaccines prevented more than 500,000 hospitalizations and 90,000 deaths in the United States in 2023 alone.
The CDC estimates that adult vaccines prevented over 500,000 hospitalizations and 90,000 deaths in the U.S. in 2023.
Being up to date on your vaccinations also protects those around you, including infants, elderly relatives, and people with compromised immune systems. This concept--called herd immunity--is especially important for diseases like measles, which can spread rapidly in unvaccinated communities. When you get vaccinated, you're not just protecting yourself; you're contributing to the health of your entire community.
What Are the Recommended Vaccines for Adults in 2026?
The 2026 adult immunization schedule, published by the CDC and endorsed by the American Academy of Family Physicians, includes several key vaccines for different age groups. For all adults aged 18 and older, an annual influenza vaccine is recommended. The seasonal flu vaccine is updated each year to target the most prevalent strains. In 2026, high-dose and adjuvanted flu vaccines are available for adults 65 and older to provide a stronger immune response.
For adults aged 19-26, the HPV vaccine (Gardasil 9) is recommended to protect against human papillomavirus, which can cause cervical, anal, and other cancers. If you missed the vaccine as a preteen, you can still catch up until age 26. Adults aged 27-45 may also receive the HPV vaccine after consulting with their healthcare provider, though it is less likely to be fully effective if you have already been exposed to the virus.
The Tdap vaccine (tetanus, diphtheria, and pertussis) is recommended once for all adults who have not previously received it, followed by a Td (tetanus and diphtheria) booster every 10 years. Pregnant women should receive Tdap during each pregnancy, preferably between 27 and 36 weeks, to protect the newborn from whooping cough. Additionally, the zoster recombinant vaccine (Shingrix) is recommended for healthy adults aged 50 and older, given in two doses 2-6 months apart. For pneumococcal disease, adults aged 65 and older, as well as younger adults with certain medical conditions, should receive PCV20 or PCV21 (depending on availability) and PPSV23 as per CDC guidelines.
How Do mRNA Vaccines Work and Should I Get a COVID-19 Booster in 2026?
The mRNA vaccines (Pfizer-BioNTech and Moderna) have been a game-changer in the fight against COVID-19. Instead of using a weakened or inactivated virus, these vaccines teach your cells to produce a harmless piece of the spike protein found on the surface of the SARS-CoV-2 virus. Your immune system then recognizes that protein as foreign and builds antibodies against it, preparing your body to fight off a real infection.
As of 2026, the CDC recommends that all adults aged 18 and older receive an updated COVID-19 vaccine booster dose if it has been at least 2 months since their last COVID-19 vaccine or infection. The boosters are now formulated to target the dominant Omicron subvariants, providing broader protection. For adults over 65 or those who are immunocompromised, additional doses may be recommended. Recent data show that staying up to date with COVID-19 vaccination reduces the risk of hospitalization by 70% and death by 80% compared to unvaccinated individuals.
If you are concerned about rare side effects like myocarditis (inflammation of the heart muscle), know that this condition is far more common from a COVID-19 infection itself than from the vaccine. The CDC continues to monitor vaccine safety and adjust recommendations based on the latest evidence. If you have questions, talk to your primary care provider to make an informed decision based on your health history.
Do I Need a Flu Shot Every Year and Why Is It Important?
Yes, the annual flu vaccine is the single best way to protect yourself and your family from seasonal influenza. The flu virus mutates rapidly, and each year's vaccine is formulated to match the strains expected to circulate. Even if the vaccine doesn't perfectly match all circulating strains, it still provides significant protection against severe illness and reduces the risk of complications like pneumonia, especially in older adults and people with chronic conditions.
During the 2025-2026 flu season, the CDC reported that the vaccine reduced doctor visits for flu by 40% and prevented an estimated 7 million influenza illnesses. For adults 65 and older, the high-dose or adjuvanted flu vaccine offers better protection because it triggers a stronger immune response. Pregnant women should also get the flu shot (not the nasal spray) to protect themselves and their babies during the first six months of life when the infant cannot be vaccinated.
The best time to get your flu shot is by the end of October, but getting vaccinated later in the season can still be beneficial. It takes about two weeks for antibodies to develop, so plan accordingly. Many pharmacies and clinics offer walk-in appointments, and the vaccine is covered by most insurance plans, including Medicare Part B.
Are There Any Side Effects or Risks I Should Be Aware Of?
Like any medication, vaccines can cause side effects, but most are mild and short-lived. Common reactions include soreness at the injection site, low-grade fever, fatigue, and muscle aches. These symptoms typically resolve within one to two days and are a sign that your immune system is responding. Serious side effects, such as severe allergic reactions, are extremely rare--occurring in less than one in a million doses.
You might have heard about concerns linking vaccines to autoimmune diseases or long-term health problems. Decades of research have found no credible evidence to support these claims. The vast majority of adverse events reported to the Vaccine Adverse Event Reporting System (VAERS) are mild. The CDC and FDA continuously monitor vaccine safety and update recommendations if new risks are identified.
If you have a history of severe allergic reactions (e.g., to gelatin, yeast, or specific antibiotics), tell your vaccinator before receiving any shot. For people with egg allergies, the flu vaccine is safe, as today's vaccines contain only trace amounts of egg protein, and even severe egg-allergic individuals can receive the flu shot with a standard observation period. Always follow up with your healthcare provider after vaccination, and report any unusual symptoms.
Can I Get Multiple Vaccines at the Same Time?
Yes, it is safe and common to receive more than one vaccine during a single visit. The CDC recommends co-administration of vaccines when needed, especially for adults who may have missed previous immunizations. For example, you can get your flu shot and COVID-19 booster on the same day, one in each arm. Studies have shown that getting multiple vaccines simultaneously does not increase side effects beyond what you might experience from a single vaccine.
In fact, combining vaccines can be more convenient and reduce the number of office visits, which helps keep you on schedule. Some combinations are even specially formulated: for instance, the Tdap vaccine already combines protection against tetanus, diphtheria, and pertussis. If you need both Tdap and a pneumonia vaccine, you can receive them together.
However, there are a few exceptions. If you have recently received a live vaccine (like the measles, mumps, and rubella (MMR) or the nasal spray flu vaccine), your healthcare provider may recommend waiting at least 28 days before receiving another live vaccine. Non-live vaccines (which include all of the vaccines discussed in this guide) can be given at any time, even on the same day. Always discuss your vaccination history with your provider to create a personalized schedule.
How Can I Find a Vaccine and Keep Track of My Schedule?
Getting vaccinated is easier than ever. Most pharmacies like CVS, Walgreens, and local chains offer walk-in services for flu, COVID-19, shingles, pneumonia, and Tdap vaccines. You can also schedule an appointment with your primary care physician or visit a local health department. Many employers and universities provide free flu shot clinics during the fall.
To keep track of your immunizations, ask your healthcare provider for a copy of your vaccination record, or use the CDC's myVaccines app or your state's immunization registry. After receiving a vaccine, you should receive a wallet card listing the vaccine type, date, and lot number. If you lose your records, your state health department may be able to provide them, especially if you were vaccinated as a child in a public clinic.
As of 2026, nearly all insurance plans cover recommended adult vaccines with no copay when you use an in-network provider. Medicare Part D covers all CDC-recommended adult vaccines, and Part B covers flu, pneumococcal, and COVID-19 vaccines. If you are uninsured, community health centers often provide vaccines on a sliding fee scale, and the Vaccines for Adults program may be available in some states. Don't let cost be a barrier--protect your health and stay up to date.