CNN – Health

By Maggie Fox, CNN Drugmaker Pfizer said Thursday it is seeing waning immunity from its coronavirus vaccine and says it is picking up its efforts to develop a booster dose that will protect people from variants. Pfizer said it would soon publish data about a third dose of vaccine and submit it to the US

By Maggie Fox, CNN The Delta variant of coronavirus is now the dominant lineage in the US, parts of Europe and elsewhere. Also known as B.1.617.2, it is clearly more transmissible, but it is unclear if it causes more severe disease. It’s taken over from the B.1.1.7 or Alpha variant in most of the countries

By Jacqueline Howard, CNN The US Food and Drug Administration has narrowed the group of Alzheimer’s disease patients who should receive the controversial drug aducanumab, sold as Aduhelm. The FDA approved changing the drug’s label to clarify that the treatment is intended specifically for patients with mild cognitive impairment or milder stages of disease, according

By Lauren Kent, CNN Flossing your teeth isn’t just important for keeping your dentist happy — it may also protect against cognitive decline. Good oral health habits like brushing and flossing may prevent cognitive impairment and dementia, according to a new analysis led by researchers at NYU Rory Meyers College of Nursing. “Given the staggering

By Deidre McPhillips, CNN Covid-19 vaccines saved hundreds of thousands of lives and prevented more than a million hospitalizations in the United States, according to new estimates from researchers at Yale University and the Commonwealth Fund. The researchers compared actual trends in Covid-19 cases, hospitalizations and deaths against a modeled trajectory of what those trends

By Elizabeth Cohen and John Bonifield, CNN A new data analysis identifies clusters of unvaccinated people, most of them in the southern United States, that are vulnerable to surges in Covid-19 cases and could become breeding grounds for even more deadly Covid-19 variants. The analysis by researchers at Georgetown University identified 30 clusters of counties

By Virginia Langmaid, CNN US death rates from cancer continued to decline from 2014 to 2018, driven mostly by drops in deaths from lung cancer and melanoma, according to a new report published Thursday. But America’s collective lack of exercise and poor diet may have driven increases in certain other cancers, including pancreatic cancer and

By Katia Hetter, CNN The Delta variant, a more transmissible — and potentially more dangerous — strain of coronavirus, now makes up more half of all new infections in the United States, according to the US Centers for Disease Control and Prevention. This variant, combined with low rates of vaccination in many parts of the

By Jacqueline Howard and Keri Enriquez, CNN The spread of the Delta coronavirus variant in the United States has some experts questioning whether it should be time to start testing even vaccinated people for the virus. Although health officials have said evidence shows vaccinated people are unlikely to spread the virus to others, Dr. Peter

By Maggie Fox, CNN Calling it a “dangerous and unethical experiment,” more than 4,000 scientists, doctors, nurses and other professionals signed a letter published Wednesday condemning the British government’s plans to drop most pandemic control measures in England on Monday, July 19. “We believe this decision is dangerous and premature,” they wrote in a letter

By Maggie Fox, CNN The coronavirus pandemic almost certainly originated from an animal, probably at a wildlife market in China, and not from a laboratory leak, a group of virus experts said Wednesday. Theories about a lab leak are almost all based on coincidence, not hard evidence, the group of 20 top experts from the

CNN Editorial Research Here is a look at Alzheimer’s disease, a progressive brain disorder that leads to loss of memory and other intellectual abilities. Facts Alzheimer’s disease is the most common form of dementia, which is a general term for the loss of memory and intellectual abilities. Alzheimer’s disease is fatal and there is no

CNN Editorial Research Here’s a look at listeriosis, a serious infection generally caused by eating food contaminated with the bacterium Listeria monocytogenes. 2001 – Listeriosis (infection with L. monocytogenes) is added to the Centers for Disease Control and Prevention’s (CDC) list of nationally notifiable diseases. General Information According to the CDC, 928 cases of listeriosis

By Keith Allen and Holly Yan, CNN A Covid-19 outbreak stemming from a Texas church summer camp has grown to about 160 cases, including infections of the highly contagious Delta variant, the Galveston County local health authority said. More than 450 people attended the camp for sixth through 12th graders in late June, hosted by