Covid: Older people will be more likely to develop Alzheimer’s disease

Elderly people who have contracted Covid-19 are more likely to develop Alzheimer’s disease in the year following their contamination. This was observed by a large study conducted using data from more than 6,200,000 people over the age of 65.

since the beginning epidemicResearchers around the world are trying to understand the possible long-term effects of infection with a virus COVID-19. Recently, researchers from Case Western River University in the US looked at the effect of SARS-CoV-2 on elderly people. To do this, they analyzed the health data of more than 6,200,000 people aged 65 or older, and followed that up in 68 health centers spread across 50 states of the United States in 2020 and 2021. Among them, 410,000 contracted Covid-19.

Posted in Alzheimer’s Disease Journal On September 13, the study revealed that the elderly were more likely to develop Alzheimer’s disease The year following their infection with SARS-CoV-2. The risk increased by 89%, according to the authors’ estimates.

Is there a relationship between COVID-19 and Alzheimer’s disease?

How do we explain that a respiratory infection like Covid-19 can have effects on the brain and lead to a neurodegenerative disease like Alzheimer’s? We posed the question to Helen Amieva, a University Professor of Psychology and Aging and a member of the Scientific Board of the B2V Memories Observatory. “It’s an epidemiological study, and it’s a very useful way to raise warning points but it doesn’t always provide explanations for such an association and such”as you say. The study therefore does not make it possible to establish a link between Covid-19 and Alzheimer’s disease. The link is reasonable because SARS-CoV-2 is known to be a neurotropic virus, that is, it penetrates the brain, This is not the case for all viruses. It enters the nasal or oral passages, where it reaches the brain.” another hand, “We know thanks to brain imaging data that Covid can do it cause brain damage.

“What we don’t know and what the study doesn’t show is whether it’s a direct or indirect link.” If it’s a direct link, that means “Brain damage caused by SARS-CoV-2 will make the bed”, through the succession of events and chemical processes, to the degeneration of neurons. On the contrary, the link can be indirect. “The older we get, the more we have weak brain Due to several factors, for example cardiovascular or inflammatory lesions. It becomes more susceptible to neurodegenerative diseases.” The hypothesis, in a very colorful way, is that infection with Covid-19 weakens the brain by adding to the lesions, thus making it doubly vulnerable to diseases such as Alzheimer’s.

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‘Covid-19 may speed things up’

Professor Helen Amieva states that there are Multiple risk factors For the development of this disease: age, socio-cultural aspects, social isolation, lack of physical activity, the presence of cardiovascular factors, the genetic aspect has been shown by science. There are still others to discover. “Pathology takes years to develop. People are not without anything and overnight, due to Covid-19, they develop Alzheimer’s disease. It first manifests in occult disorders and then there is an increase in symptoms, but this happens over decades. Follow people while studying Perhaps they were already on the path to illness. Covid-19 may be accelerating, that is the hypothesis of this paper.”.

It is not excluded that Covid-19 may cause other neurological diseases or accelerate their development, as the virus again manages to infiltrate the brain, But no one can say that.. “Studies are ongoing. This demonstrates the importance of following affected people, especially those who have had significant and above all persistent symptoms, to see if they are specifically predisposed to developing a particular disease. At the moment, we don’t have enough hindsight.”

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