A Chinese COVID-19 vaccine seems to be safe and effective, early trial results suggest, but one expert says the findings should be regarded with caution.
The CoronaVac vaccine is based on inactivated SARS-CoV-2 virus. It was tested in a phase 1/2 clinical trial that included more than 700 healthy volunteers, ages 18-59, who were recruited in China between April 16 and May 5.
Immunity to the new coronavirus may last six months or longer after people recover from infection, a new study suggests.
Researchers collected blood samples from 149 patients who had COVID-19 early in the pandemic and analyzed them for immune cells that make antibodies that block the SARS-CoV-2 virus from entering cells.
One month after infection, all of the patients had coronavirus...
Early COVID-19 vaccine trial results announced by Pfizer this week caused hopes to soar for a swift end to the pandemic that has killed more than 242,000 and infected more than 10 million in the United States alone.
But even if the preliminary results released Monday pan out, it will still take many months to produce enough of the vaccine to inoculate everyone in the United States, expert...
An experimental COVID-19 vaccine appeared to be safe and triggered an immune response in healthy people, according to preliminary results of a small, early-stage clinical trial.
The study of the vaccine based on inactivated whole SARS-CoV-2 virus (BBIBP-CorV) included more than 600 volunteers in China, ages 18 to 80. By the 42nd day after vaccination, all had antibody responses to the...
When parents have concerns about the safety of childhood vaccinations, it can be tough to change their minds, as a new study shows.
The study involved "vaccine-hesitant" parents -- a group distinct from the staunch "anti-vaxxer" crowd. They have worries about one or more routine vaccines, and question whether the benefits for their child are worthwhile.
One of the big questions around any new COVID-19 vaccine is: Will it safely protect those at highest risk from the illness -- older people?
Now, the results of an early phase 1 trial in 40 adults over the age of 55 suggests that one vaccine, under development by drugmaker Moderna, elicits an immune system response that's equal to that seen in younger recipients.
The coronavirus pandemic and the upcoming flu season could pose a double threat, but many U.S. parents plan to skip flu shots for their kids, a new survey finds.
Though public health experts stress the need for people of all ages to get the seasonal flu vaccine during the COVID-19 pandemic, 1 in 3 U.S. parents said they don't plan on taking their child for a flu shot this fall. Just a...
Low blood levels of vitamin D might heighten people's odds for severe or even fatal COVID-19, new research shows.
Taking in a healthy level of vitamin D may therefore "reduce the complications, including the cytokine storm [release of too many proteins into the blood too quickly] and ultimately death from COVID-19," said study author Dr. Michael Holick. He's a professor of medicine, p...
Parents who choose to forgo or delay their children's vaccinations may quickly find themselves without a pediatrician.
Just over half (51%) of pediatric offices in the United States have a policy to dismiss families that refuse childhood vaccines, a nationwide survey found. Thirty-seven percent of pediatricians themselves said they often dismissed families for refusing vaccines, ...
A new clinical trial will try to determine whether the measles, mumps and rubella (MMR) vaccine can protect health care workers from being infected with COVID-19.
Hundreds of millions of people have received the MMR vaccine since it was developed nearly 50 years ago. It's usually given to children before age 6. Growing evidence suggests that the vaccine may also prevent COVID-19.
Since the pandemic began, it's been clear that men are more vulnerable to getting a severe case of COVID-19 compared to women.
Now, researchers say they've uncovered significant differences in how male and female immune systems respond to the new coronavirus may help explain why men are more likely than women to have severe COVID-19 and to die from the illness.
Despite the wave of criticism that has followed the U.S. Food and Drug Administration's emergency approval of convalescent plasma to treat COVID-19 patients, infectious disease experts say the therapy remains promising.
Some scientists have questioned both the timing of the approval and the veracity of a key survival statistic cited by FDA Commissioner Dr. Stephen Hahn. And the clinic...
Since the pandemic began, it's been known that the severity of coronavirus illness varies widely between people. Could the common cold be the reason why?
It's still just a theory, but researchers in California suspect that if you've recently had a cold -- many of which are also caused by coronaviruses -- your immune system's T-cells might recognize SARS-CoV-2 and help fight it.
With several potential COVID-19 vaccines now in clinical trials, U.S. policymakers need to plan for the next hurdle: Ensuring Americans actually get vaccinated.
That's according to a new report from the Johns Hopkins Center for Health Security. It lays out recommendations for winning the public's trust of any future vaccine, and helping them access it as easily as possible.
Two new studies offer hope for an effective coronavirus vaccine -- and for the notion that prior infection also confers immunity.
Both studies were conducted in rhesus macaque monkeys, so testing in humans is required for more definitive proof. But in one study, monkeysdeveloped immunity against the new SARS-CoV-2 coronavirusafter receivingexperimental vaccines.
A new oral polio vaccine promises to help make polio a disease of the past, according to the results of a phase 1 clinical trial.
Polio was almost eliminated worldwide -- except in vaccine-induced cases. In those cases, the weakened virus used in vaccines developed the ability to escape from immunized individuals and spread in places with low vaccination rates.
COVID-19 is likely to be around for years to come, haunting humans as either a yearly flu-like illness or as a virus that occasionally resurfaces following years of dormancy, a new Harvard modeling study argues.
It's unlikely that COVID-19 will go the way of its closest cousin, SARS (severe acute respiratory syndrome), which was eradicated by an intense public health effort following ...
Vaccines protect you and your family against a number of diseases, so it's crucial to keep them updated, health experts say.
"It's important to review your vaccination records with your health care provider," said Libby Richards, associate professor of nursing at Purdue University in West Lafayette, Ind. "Vaccinations aren't just for kids. Adults need them, too."
Nearly 1 in 5 American adults has mistaken beliefs about vaccines, and misinformation is more common among those who rely on social media than on traditional media, a new study finds.
Researchers surveyed nearly 2,500 adults nationwide in the spring and fall of 2019, when the United States was dealing with its largest measles outbreak in decades, and found that up to 20% of respon...
A single dose of the human papillomavirus (HPV) vaccine works as well as multiple doses to protect older teen girls against preinvasive cervical disease, which can develop into cervical cancer, researchers say.
For the study, the researchers analyzed data on more than 133,000 females aged 9 to 26. Half weren't vaccinated and half received one or more HPV vaccine doses between January...
Vaccination and screening could nearly wipe out cervical cancer in North America in the next 20 years and rid the world of the disease within the next century, researchers say.
In a new study, the researchers assessed the potential impacts of the World Health Organization's (WHO) draft strategy for cervical cancer elimination, which calls for 90% of girls to be vaccinated against ...
Millennials are less likely to have had a flu shot this season and are more likely than other American adults to agree with some false anti-vaccination information, according to a new nationwide survey.
The results also showed that nearly one-third of adults polled don't plan to get a flu shot and many underestimate how deadly flu can be.
The tuberculosis (TB) vaccine is far from infallible, but new animal research suggests the problem is not the vaccine but how it is delivered.
When given to monkeys intravenously rather than as an injection, the vaccine was much more effective, researchers from the University of Pittsburgh and the U.S. National Institute of Allergy and Infectious Diseases found.
Flu continues to spread throughout the United States and has reached elevated levels in nearly every state.
"We're still seeing an increase in activity, which is what we've been experiencing over the last few weeks," said Dr. Scott Epperson, an epidemiologist in the influenza division of the U.S. Centers for Disease Control and Prevention (CDC).