Risk of new heart problems jumps after COVID-19; mRNA shot side effects no different for cancer patients
The following is a summary of some recent studies on COVID-19. They include research that warrants further study to corroborate the findings and that has yet to be certified by peer review.
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Risk of new heart problems much higher after COVID-19 recovery
Long after recovery from COVID-19, people face significantly higher risks for new heart problems, a large study has found.
Researchers at the US Department of Veterans Affairs compared rates of new cardiovascular problems in 153,760 individuals infected with the coronavirus before vaccines were available, 5.6 million people who did not catch the virus, and another 5.9 million people whose data was collected before the pandemic.
An average of one year after their recovery from the acute phase of the infection, the COVID-19 survivors had a 63 per cent higher risk for heart attack, a 69 per cent higher risk for problematic irregular heart rhythm, a 52 per cent higher risk of stroke, a 72 per cent higher risk of heart failure, and a nearly three times higher risk of a potentially fatal blood clot in the lungs compared with the other two groups, according to a report published on Monday in Nature Medicine.
The elevated risks among former COVID-19 patients were evident in young and old, Blacks and whites, males and females, people with and without diabetes and with and without kidney disease, as well as smokers and nonsmokers, said Ziyad Al-Aly of the VA St Louis Health Care System and Washington University in St Louis.
mRNA vaccine side effects no worse in cancer patients
COVID-19 vaccines using mRNA technology do not produce any extra short-term side effects in cancer patients, a new study suggests.
Researchers surveyed 1,753 recipients of two doses of the Pfizer-BioNTech vaccine, about two-thirds of whom had a history of cancer and about 12 per cent of whom were receiving chemotherapy, immunotherapy, radiation therapy or surgery for their disease.
More than 90 per cent of the cancers involved solid tumours. The Pfizer vaccine has been shown to work well in such cases. People with and without cancer reported similar rates of pain at the injection site, muscle pain, joint pain, fever, chills, headache, nausea, and fatigue, the research team reported in the Journal of the National Comprehensive Cancer Network.