Poor sleep, prior medical conditions may raise long Covid risk by 3x
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In contrast, the risk of long Covid in people with pre-existing conditions was only 1.8 times higher among people with an average nightly sleep duration. 
Explained: How Covid-19 heightens risk of heart attack, stroke
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Experts have long observed that the Covid-19 coronavirus increases the likelihood of having a heart attack or stroke for up to a year after infection, particularly for those who already have underlying heart conditions.
Why old age is a risk factor for Covid-19
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Increases in the immune protein, known as auto-antibodies, may also lead to blood clotting disorders such as thrombosis, showed the study, published in the journal npj Aging.  
Covid virus found in tears of patients with no eye disease: AIIMS study
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In the study, published in the journal Cureus, the team included 40 patients, with 26 (65 per cent) classified as having moderate Covid, six (15 per cent) classified as having severe Covid, and the remaining having mild Covid.
1 in 4 mild Covid survivors face impaired lungs a year later: Study
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There is increasing data that show a persistently impaired pulmonary function upon recovery after severe infection. Little is known however about the extent, recovery and determinants of pulmonary impairment across the full spectrum of Covid-19 severity over time.
How obesity contributes to long Covid
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A growing body of evidence has suggested a link between long Covid and obesity -- more than 1 billion people worldwide and about 135 million in India.Obesity is known to cause lethargy, raise fatigue, shortness of breath, limit range of physical activities -- symptoms that are independently.
Covid can fuse brain cells leading to brain fog, headaches: Study
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This could explain brain fog, headaches, loss of taste and smell and other long-term neurological symptoms some patients experience as 'long Covid' months after their initial infection. To understand, the teams from the universities of Queensland, Macquarie in Australia, and Helsinki in Finland explored how viruses alter the function.
Covid mRNA vax safe, has no serious side effects in infants: Study
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The study marks the first analysis looking for serious side effects from the mRNA vaccines in young children. Researchers from the Kaiser Permanente and the US Centers for Disease Control and Prevention(CDC) examined patient records from June 2022 to March 2023 for both the Pfizer and Moderna vaccines.
What causes fatigue after Covid infection?
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A team from the Newcastle University in the UK carried out a battery of behavioural and neurophysiological tests on people suffering from post-Covid fatigue and compared them to people without fatigue. The researchers discovered people with post-Covid fatigue showed underactivity in three specific areas of the nervous system.
Study traces Covid's seasonal behaviour to genetics, global change
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The first study, published in Evolutionary Bioinformatics, correlates Covid cases and deaths in the last two years with average annual temperature and latitude in 171 countries across the globe. The researchers also evaluated relationships between Covid and environmental health, including indicators of global change.
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