(Reuters) - The United States last week reported a 23% drop in new cases of COVID-19 and a 16% fall in the number of people hospitalized with the virus, with both figures declining for a fifth week in a row.
As Americans anxiously watch the spread of coronavirus variants that were first identified in Britain and South Africa, scientists are finding a number of new variants that seem to have originated in the United States — and many of them may pose the same kind of extra-contagious threat.
In a study posted on Sunday, a team of researchers reported seven growing lineages of the coronavirus, spotted in states across the country. All have gained a mutation at the exact same spot in their genes.
People with dementia had significantly greater risk of contracting the coronavirus, and they were much more likely to be hospitalized and die from it, than people without dementia, a new study of millions of medical records in the United States has found.
Their risk could not be entirely explained by characteristics common to people with dementia that are known risk factors for Covid-19: old age, living in a nursing home and having conditions like obesity, asthma, diabetes and cardiovascular disease. After researchers adjusted for those factors, Americans with dementia were still twice as likely to have gotten Covid-19 as of late last summer.
Israel’s largest COVID-19 testing lab says it has found evidence indicating that the Pfizer-BioNTech vaccine significantly reduces the transmissibility of the coronavirus, offering a tentative answer to one of the world’s most burning questions.
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