vaccine trials

A negative version of the placebo effect may be behind many instances of mild side effects associated with the jabs, a study suggests.

Health Canada has given the single COVID-19 shot the official greenlight for use in people 18 and older.

NIH researcher Andaleeb Sajid discusses her study’s finding that ticks were unable to feed on vaccinated guinea pigs, preventing transmission of the pathogen that causes Lyme disease.

RTS,S has several flaws but could still save tens of thousands of lives, experts say.

In his book’s Introduction, physician-scientist Paul A. Offit reviews the unusual constellation of circumstances around the development of COVID-19 vaccines.

President Biden’s planned rollout of additional COVID-19 vaccine doses is set to begin next week, but questions remain about who should get them.

More than a dozen vaccines for tuberculosis are currently being tested in clinical trials. Some use whole bacteria as BCG does, while others deliver protein subunits or genetic material carried by viral vectors.  

This month marks the 100-year anniversary of BCG, still the only approved vaccine against the lethal pathogen. But there are new vaccines for this wily foe on the horizon.

It’s unclear how long protections against infection will last from the initial vaccinations, and health authorities say additional jabs will likely be necessary.

One hundred years after its invention, BCG has stood the test of time as a vaccine against tuberculosis.

Mix-and-match shots could simplify vaccine rollout and stimulate more-robust immune responses. Ongoing clinical trials will soon give answers.

Johnson & Johnson’s vaccine is less effective at preventing COVID-19 than other approved vaccines are, but experts say it could still be an important tool in curbing the pandemic.

The world was rocked by the COVID-19 pandemic this year, but researchers rose to all manner of challenges.

A recent study elucidates some of the changes that occur in the body after inoculation with a tuberculosis vaccine.

As researchers test existing vaccines for nonspecific protection against COVID-19, immunologists are working to understand how some inoculations protect against pathogens they weren’t designed to fend off.

A vaccine expert explains that such answers likely won’t come until a vaccine has already been approved and administered to millions of people.

Although scientists debate the ethics of deliberately infecting volunteers with SARS-CoV-2, plenty of consenting participants have been exposed to all sorts of pathogens in prior trials.

The hold will likely delay trial results, and scientists say the pause is proof that safety protocols in clinical trials are working as they should.

Some researchers express skepticism given the lack of data about the vaccine’s safety and efficacy, and the country plans to vaccinate healthcare workers, teachers, and others even before testing is complete.