COVID-19 and the Elderly: Understanding the Risk Factors

Of all the risk factors researchers have studied throughout the pandemic, age has consistently emerged as one of the strongest predictors of how severe a COVID-19 infection is likely to be. Understanding why can help older people and the people who care for them, make sense of the guidance aimed specifically at this age group.

How much does age increase the risk?

The difference in mortality risk by age is substantial. Compared with people under 40, the risk of dying from COVID-19 has been estimated at around 50 times higher for people aged 70 to 79 and around 70 times higher for people over 80. These figures illustrate just how steeply risk climbs with age, even before accounting for other individual health factors.

Why age increases risk

Age-related risk is largely driven by physiological changes that come with getting older, rather than age itself being a standalone cause. The immune system naturally becomes less effective at mounting a strong response to new infections as people age, a process researchers call immunosenescence. Older people are also more likely to have one or more underlying health conditions, including cardiovascular disease, diabetes and chronic respiratory illness, all of which independently raise the risk of severe outcomes from COVID-19.

The role of frailty

Frailty, a state of increased vulnerability resulting from a decline in the body's physical reserves, has emerged as a particularly strong predictor of poor outcomes in older people hospitalised with COVID-19. An estimated 10% of people over 65 have frailty, a figure that rises to between a quarter and a half of people over 85. Frailty appears to matter more for outcomes than chronological age alone, which is part of why clinicians increasingly assess frailty specifically, rather than relying on age as a single number.

Long COVID in older people

Older people face a greater risk than younger people of experiencing persistent symptoms after a COVID-19 infection and long COVID is a particular concern in this age group. COVID-19 has also been shown to potentially trigger or worsen chronic conditions that are already common in older age, including cardiovascular disease, respiratory illness, neurodegenerative conditions such as dementia and general functional decline.

What protective steps make the most difference

Staying up to date with eligible COVID-19 vaccinations remains one of the most effective ways older people can reduce their risk of severe illness and the NHS continues to prioritise older age groups in its vaccination programme. Managing existing health conditions well, staying as physically active as individual health allows and seeking prompt medical advice at the first sign of COVID-19 symptoms, particularly for anyone eligible for antiviral treatment, all meaningfully reduce the risk of a mild infection turning serious.

How the NHS structures support for older patients

Beyond vaccination, the NHS has built several parts of its COVID-19 response specifically around the needs of older patients. GP practices are encouraged to prioritise health reviews for older and more vulnerable patients and local health and care teams often coordinate more closely for older people with multiple existing conditions, since COVID-19 rarely affects just one aspect of health in isolation for this group. Community pharmacy services and, where needed, home visits for vaccination remain available for older people who find it difficult to attend a larger vaccination site, recognising that mobility and transport can themselves be barriers to protection.

Social care settings, including care homes, have also remained a particular focus of COVID-19 policy given how quickly outbreaks can spread in shared living environments and how much higher the average level of frailty tends to be among residents. Infection control measures, staff vaccination uptake and rapid access to testing in these settings all continue to be treated as a distinct policy area from general community guidance, reflecting the genuinely different risk profile involved. Families considering care for an older relative can reasonably ask a care home directly about its current infection control and vaccination policies as part of choosing where that care takes place, alongside the other usual factors that go into that kind of decision.

Advice for family members and carers

If you care for an older relative, knowing the warning signs that warrant medical attention, such as breathlessness, confusion, or a high fever that doesn't settle, is one of the most useful things you can do. Helping an older relative understand and access antiviral treatment quickly if they test positive and are eligible can also make a meaningful difference, given how important early treatment timing is for these medicines to work effectively.

Balancing caution with quality of life

Especially for older people living independently, it's worth balancing sensible precautions against COVID-19 with the very real value of social contact, physical activity and independence, all of which matter for overall health and wellbeing. Blanket isolation isn't generally recommended outside of specific high-risk periods or individual medical advice and GPs can help older patients and their families find an approach that fits their personal health circumstances.

A quick recap

Age remains one of the strongest risk factors for severe COVID-19, driven mainly by a naturally less responsive immune system, a higher likelihood of underlying health conditions and frailty. Vaccination, good management of existing conditions and prompt access to treatment when eligible all meaningfully reduce risk for older people.

Frequently asked questions

At what age does COVID-19 risk start increasing significantly?

Risk rises gradually with age rather than jumping at a single cut-off, though research and NHS guidance have often used age 65 or 70 as practical thresholds for prioritising additional protection such as vaccination and antiviral treatment.

Is frailty more important than age alone?

Research suggests frailty is a particularly strong predictor of poor outcomes, sometimes more informative than chronological age by itself, which is why clinicians increasingly assess it directly in older patients.

Should healthy older people without other conditions still be cautious?

Age itself remains an independent risk factor even without other underlying conditions, so staying up to date with vaccination and seeking prompt advice for COVID-19 symptoms remains sensible regardless of otherwise good health.

Does long COVID look different in older people?

Older people face a higher risk of persistent symptoms after COVID-19 and may also experience COVID-19 triggering or worsening existing chronic conditions, which can make long COVID harder to distinguish from age-related health changes.

What should carers watch for that might be easy to miss?

Confusion or sudden changes in alertness can be a significant symptom in older people that's easy to attribute to other causes, so any sudden change in mental clarity alongside possible COVID-19 exposure is worth taking seriously.

Do care home residents follow different COVID-19 guidance to older people at home?

Care homes generally follow additional infection control measures beyond general community guidance, reflecting the higher risk of rapid spread and the typically greater average frailty of residents in shared living settings. Family members visiting a care home may also be asked to follow specific precautions during periods of higher local transmission, such as testing beforehand or wearing a mask, particularly if they have symptoms of any respiratory illness themselves, since these settings understandably tend to take a considerably more cautious, structured approach overall than an individual private household typically would from one day to the next.