He's 50 pounds lighter than when the virus struck.

Bell, 70, is among millions of older adults who have grappled with long covid — a population that has received little attention even though research suggests seniors are more likely to develop the poorly understood condition than younger or middle-aged adults.

Long covid refers to ongoing or new health problems that occur at least four weeks after a covid infection, according to the US Centers for Disease Control and Prevention.

who survived covid infections had symptoms of long covid up to four months after infection — more than double the 14% rate an earlier study found in adults ages 18 to 64.

(Other studies suggest symptoms can last much longer, for a year or more.)

The BMJ study examined more than 87,000 adults 65 and older who had covid infections in 2020, drawing on claims data from UnitedHealth Group's Medicare Advantage plans.

The data encompasses both older adults who were hospitalized because of covid (27%) and those who were not (73%).

The higher rate of post-covid symptoms in older adults is likely due to a higher incidence of chronic disease and physical vulnerability in this population — traits that have led to a greater burden of serious illness, hospitalization, and death among seniors throughout the pandemic.

"On average, older adults are less resilient.

For those individuals, the consequences can be devastating: the onset of disability, the inability to work, reduced ability to carry out activities of daily life, and a lower quality of life.

But in many seniors, long covid is difficult to recognize.

"The challenge is that nonspecific symptoms such as fatigue, weakness, pain, confusion, and increased frailty are things we often see in seriously ill older adults.

Or disease processes that underlie dementia may already have been underway, and a covid infection may serve as a tipping point, hastening the emergence of symptoms.

Research conducted by Sinvani and colleagues, published in March, found that 13% of covid patients who were 65 and older and hospitalized at Northwell Health in March 2020 or April 2020 had evidence of dementia a year later.

Dr.

Thomas Gut, associate chair of medicine at Staten Island University Hospital, which opened one of the first long covid clinics in the U.S., observed that becoming ill with covid can push older adults with preexisting conditions such as heart failure or lung disease "over the edge" to a more severe impairment.

In older adults especially, he said, "it's hard to attribute what's directly related to covid and what's a progression of conditions they already have."

That wasn't true for Richard Gard, 67, who lives just outside New Haven, Connecticut, a self-described "very healthy and fit" sailor, scuba diver, and music teacher at Yale University who contracted covid in March 2020.