Deliberately infecting people with a disease-causing agent as part of carefully considered medical research can be ethically acceptable or even necessary.
Babies are normally vaccinated against measles at 12 months old. But doctors are now suggesting having the shot as early as six months might be worthwhile for youngsters traveling overseas.
The flu vaccine takes about two weeks to start working and only protects against influenza, so you can still get sick from other viruses after your flu shot.
The 2018-2019 flu season was less deadly than the last. But the pattern of infection was unusual, thanks to the various strains circulating and the way flu shots work over time.
Outbreaks often affect the same areas because, once released, the bacteria continues to live as spores in the soil.
An economics risk analysis offers some insight into the modern anti-vaxx movement.
Rift Valley Fever infects millions of humans and livestock in Africa and Arabia. To fight it, scientists are developing a first of its kind vaccine that can be used on humans and animals.
Measles cases in the US have reached their highest in 25 years. A bioethicist argues why parents opposed to vaccination are not just wrong about the science, but about the morals.
Given the high burden of malaria in sub-Saharan Africa, a partially effective vaccine is considered better than none.
The Ebola virus claimed 11,000 lives in 2014. Today, scientists may have cured the disease in guinea pigs by using antibodies.
Social media activity suggests that pro-vaccine evidence may be starting to outweigh anti-vaxxer disinformation.
Until then we need to get effective, accessible treatment for all who need it, while deploying the many prevention tools at our disposal.
Four new Ebola treatments are being tried out in the DRC.
A bit of humility can go a long way.
Effective communication strategies will be crucial if scientists want to counter the worrying anti-vaccination trend.
The new Ebola vaccine is yet to be licensed but evidence shows that it protects against the strain of the virus.
Without the current experimental vaccine the Ebola outbreak in the DRC has the potential to spiral out of control.
A measles outbreak is causing major concern in a Washington county where only 22 percent of children are vaccinated against the disease. A vaccine expert explains the risks.
Q fever explained.
Vaccines have 'non-specific effects' that have the potential to save millions of lives.