It is unclear whether the people who died had underlying health problems, whether Covid was the cause of their deaths for a long time, or whether it was a contributing factor.
New data comes as state and federal health officials work to understand the importance and severity of long-acting Covid, which can affect up to 30 percent of people who contract the virus, according to studies published in the Journal of the American Medical Association. . Two years after the pandemic, relatively little is known about the long-term prevalence of Covid, how to diagnose it, or best practices for treatment.
“The overall risk factors for long-term COVID mortality will be significant and evolving,” said Mady Hornig, a physician and scientist at Columbia University’s Mailman School of Public Health who is researching long-term Covid. The CDC is still collecting and reviewing data, but so far NCHS has identified 60 death certificates listing long Covid or similar terminology, such as “post-Covid,” in 2021 and another 60 during the first five months of 2022. .
A CDC spokesman said the agency was “working to identify any deaths attributed to … long Covid-19” and plans to release the numbers “soon.”
There is no evidence for long Covid, and the CDC and the medical community have no official definition. But health workers across the country are diagnosing patients who have previously contracted Covid-19 from a wide range of symptoms that often include fatigue, shortness of breath and brain fog. Researchers and scientists have said that between 10 and 30 percent of people who have survived a Covid-19 infection will develop Covid for a long time. A CDC study released on May 27 said that one in five adults in the U.S. could develop the disease.
However, it is difficult to determine exactly how many people in the country have Covid for a long time. The condition is not easy to diagnose, especially without a universal definition. Long Covid can affect several organ systems and what may be a long symptom of Covid for one patient may not be so for another.
“Global mortality risk factors with long COVID will be important and evolving”
Mady Hornig, physician and scientist at Columbia University Mailman School of Public Health
The blurred diagnostic process has made it more difficult for researchers to study Covid in the long term. Dozens of hospitals and medical clinics accept patients with long-standing symptoms of Covid for treatment and try to use this data to better understand the condition and why it is manifested in some who have contracted the virus before, but not in others. The National Institutes of Health is overseeing Covid’s largest national long-term study.
In October 2021, following the approval of the CDC, U.S. hospitals and medical facilities began tracking patients with long-standing symptoms of Covid with a specific identification known as the ICD-10 code. This coding system, used for most notifiable diseases, has helped researchers restrict which group of people to study.
However, in almost all cases, the long populations of Covid samples are limited, which limits the ability of researchers to understand how the disease affects different people.
“There is a significant undetection of long Covid,” said Sairam Parthasarathy, head of the pulmonary division at the University of Arizona School of Medicine and one of the leaders in his long Covid study. “It’s linked to health literacy … letting someone know you have a medical problem. If someone thinks they don’t have a medical problem, sometimes they may not be looking for care.”
Socio-economic factors also come into play, Parthasarathy said, even if someone has the resources and time to go to the doctor.
There is no established phrase or terminology that hospitals use in death certificates; the CDC has yet to issue guidelines. Therefore, there are no official estimates of long deaths for Covid.
Very few studies have examined the relationship between long Covid and mortality. But a November 2021 study of European cancer patients, published in The Lancet, showed a link between long Covid and sample population morbidity. The study found that about 15 percent of those who survived Covid-19 had long-term symptoms of Covid and their survival outcomes were significantly worse. He also found that those individuals were more likely to discontinue systemic cancer therapy permanently.
“It is certainly possible and probable that someone who was sick with Covid will develop complications after Covid and die from a long Covid,” said Jerry Krishnan, a lung doctor at the University of Illinois at Chicago who runs the long Covid clinical study of the institution. “I do not see the data. But I’ve heard that people have developed heart, lung, or brain complications after having Covid. And they finally died. “
CDC analysis extracts death certificates that contain words like “long covid” or “post covid,” which could indicate that someone has died as a result of the disease. NCHS conducted a similar review of death certificates when the Covid-19 pandemic began in 2020. Finally, the CDC issued a warning for health care providers to use a specific code for deaths that could be attributed to Covid-19. It allowed federal and local researchers to study how and if the virus caused serious illness in some groups more than in others.
Although there is no long-term death certificate code for Covid-19, Parthasarathy said it is possible to rely on what the medical community already knows about how severe Covid-19 disease affects different populations to have a idea of the long-term effects of Covid on these same groups of people.
“We know that people of color were disproportionately affected by Covid’s disease rather than a mild SARS-CoV-2 infection. And we know that people who are hospitalized with Covid are more likely to have long Covid. “He said he recently took part in a presentation with NCHS which indicated that people of color had a higher prevalence of long Covid. “When they showed these numbers … it was like, ‘of course.’ We were able to connect the dots.”