Pneumonia is one of the leading causes of hospitalization and death in adults over 65, but most cases are preventable with a combination of vaccines, daily habits, and awareness of lesser-known risk factors. The strategies that matter most fall into a few categories: staying current on vaccinations, maintaining good oral and nutritional health, reducing aspiration risk, and catching early warning signs before a mild infection becomes dangerous.
Get the Right Vaccines on Schedule
Vaccination is the single most effective tool for preventing pneumonia in older adults, and the landscape has simplified in recent years. The CDC now recommends that all adults 50 and older who have never received a pneumococcal conjugate vaccine get either PCV20 or PCV21. Both are one-and-done options: no follow-up dose is needed. If PCV15 is used instead, a second vaccine (PPSV23) is needed about a year later. For adults 65 and older who previously received both PCV13 and PPSV23, the decision about whether to also get PCV20 or PCV21 is one to discuss with a doctor.
Beyond the pneumococcal vaccine, two other shots play a major role. The seasonal flu vaccine reduced pneumonia by roughly 60% and pneumonia-related hospitalization by about 55% in adults 65 and older in a prospective cohort study. That’s because influenza often opens the door to secondary bacterial pneumonia, and blocking the flu blocks that cascade. COVID-19 vaccination matters for the same reason, since severe COVID can cause viral pneumonia directly and leave the lungs vulnerable to bacterial infection.
RSV vaccines, approved for adults 60 and older, are a newer addition worth knowing about. In postlicensure studies, a single dose of the protein-based RSV vaccine reduced RSV-related hospitalization by 75% to 82% during the first season after vaccination. Protection does wane over time, so the timing of vaccination relative to RSV season matters.
Take Oral Hygiene Seriously
This is one of the most overlooked prevention strategies. Bacteria that accumulate in dental plaque and diseased gums can be inhaled into the lungs, especially during sleep, and cause aspiration pneumonia. This is particularly common in nursing home residents and people with reduced mobility or consciousness. Research published in the Journal of the American Medical Directors Association found that improved oral care directly reduces the risk of aspiration pneumonia in elderly populations.
What counts as good oral care here goes beyond brushing. It means brushing teeth or cleaning dentures at least twice daily, using an antiseptic mouthwash, and getting regular dental checkups. For caregivers assisting someone who can’t manage oral care independently, gentle brushing of the teeth, gums, and tongue after meals makes a measurable difference. If dentures fit poorly, they should be adjusted, since ill-fitting dentures trap bacteria and increase aspiration risk.
Reduce Aspiration Risk During Meals
Aspiration pneumonia, caused by food, liquid, or saliva entering the lungs instead of the stomach, accounts for a large share of pneumonia cases in older adults. People with swallowing difficulties (dysphagia), stroke history, dementia, or Parkinson’s disease are especially vulnerable. A few practical changes at mealtimes can significantly cut the risk.
Positioning is the foundation. The person should sit fully upright in a chair during meals. If they’re confined to bed, raise the backrest to 90 degrees. After eating, keep them upright for at least 30 minutes. For those receiving tube feeding, the backrest should stay at 30 degrees or higher during continuous feeds, and for at least an hour after intermittent feeds.
Food texture also matters. Thickened liquids are easier for many people to control in the mouth, preventing premature spillage into the airway. A speech therapist can assess which food consistency is safest for a specific individual, since thickened liquids aren’t appropriate for everyone. Other helpful techniques include a chin-down posture while swallowing, small bites, and allowing plenty of time between mouthfuls. Rushing meals is a common and avoidable trigger for aspiration.
Address Nutritional Gaps, Especially Vitamin D
Older adults are disproportionately likely to be deficient in vitamin D, and that deficiency is directly tied to respiratory infection risk. In a prospective study of institutionalized elderly adults, those who developed respiratory tract infections had significantly lower vitamin D levels, with levels below 10 ng/mL being a clear risk marker. A meta-analysis of over 48,000 participants found that daily vitamin D supplementation of 400 to 1,000 IU for up to 12 months reduced the odds of developing at least one acute respiratory infection by 30% compared to placebo.
Protein intake matters too, though it gets less attention. Older adults often eat less overall, and inadequate protein weakens the immune cells that defend the lungs. Ensuring regular meals with sufficient protein from eggs, dairy, legumes, fish, or meat helps maintain the immune function needed to fight off respiratory pathogens before they take hold.
Quit Smoking, Even Late in Life
Smoking damages the lungs’ natural defenses by paralyzing the tiny hair-like structures (cilia) that sweep bacteria and debris out of the airways. Quitting at any age helps, but the timeline for pneumonia risk reduction is slower than many people expect. Among former smokers without chronic obstructive pulmonary disease, the risk of pneumonia hospitalization dropped by about 38%, but only in those who had quit more than 10 years earlier. Those who quit more recently didn’t yet show a statistically significant reduction.
For smokers who already have COPD, the picture is more complex. Studies have not found the same clear risk reduction with cessation in this group, likely because the structural lung damage from COPD persists. That said, quitting still slows further lung deterioration and reduces the frequency of exacerbations that can lead to pneumonia.
Review Medications That Increase Risk
Certain common medications quietly raise pneumonia risk in older adults. Proton pump inhibitors, the acid-suppressing drugs widely prescribed for heartburn and reflux, are a significant example. A study of over 75,000 adults aged 60 and older found that the risk of pneumonia in the second year of PPI use was 82% higher than in matched controls who weren’t taking the drugs. Stomach acid serves as a barrier against bacteria, and suppressing it can allow pathogens to colonize the upper digestive tract and be aspirated into the lungs.
Sedatives and certain sleep medications also increase risk by suppressing the cough reflex and reducing alertness during swallowing. If an older adult is on any of these medications long-term, it’s worth a conversation about whether the drug is still necessary or whether a lower dose or alternative could work.
Recognize Pneumonia Early in Older Adults
Pneumonia in people over 65 often looks nothing like the classic presentation in younger adults. The hallmark symptoms of high fever, productive cough, and chest pain may be muted or entirely absent. Instead, the first signs are frequently confusion, unusual drowsiness, loss of appetite, or a general sense that something is “off.” Falls and sudden functional decline, like an older adult who could dress themselves yesterday but can’t today, can be early indicators.
This atypical presentation is dangerous because it delays treatment. Caregivers and family members who know what to watch for can catch pneumonia days earlier, which makes a real difference in outcomes. Any sudden change in mental clarity, new or worsening fatigue, or unexplained drop in function in an older adult warrants prompt evaluation, especially during flu and RSV season or after a recent illness.
Keep the Environment Clean and Humid
Respiratory pathogens spread easily in the places where older adults spend the most time. Frequent handwashing by caregivers and visitors is one of the simplest and most effective barriers. During cold and flu season, limiting contact with people who are actively sick protects against the viral infections that commonly precede bacterial pneumonia.
Indoor air quality matters more than most people realize. Dry heated air in winter dries out mucous membranes, reducing the lungs’ ability to trap and expel pathogens. A humidifier that keeps indoor humidity between 40% and 60% helps maintain those defenses. Regular cleaning of shared surfaces, especially in assisted living or nursing home settings, reduces the bacterial and viral load in the environment.
Encourage Physical Activity
Even modest physical activity improves lung capacity and helps the immune system function more effectively. For older adults who are mobile, regular walking, light stretching, or chair-based exercises keep the respiratory muscles engaged and promote deeper breathing, which helps clear secretions from the lungs. For those who are bedridden or have limited mobility, repositioning every two hours and encouraging deep breathing exercises (like blowing into a simple incentive spirometer) can prevent secretions from pooling in the lower lungs, where infections take root.