The oral polio vaccine is most commonly used in the developing world, despite one big problem.
CDC/Alan Janssen, MSPH
A challenge in eradicating polio comes from a version of the vaccine itself, which relies on live but attenuated virus. Rationally designing a new vaccine could help get rid of polio once and for all.
Anti-vaccine protesters at a rally.
Ted S. Warren/AP Photo
Studies have shown that the reasons for anti-vaccine sentiment run deep, and scientific facts don't often matter. A new study drills deeper into reasons for resistance and possible ways to counteract them.
The vaccine coverage needed for herd immunity varies from disease to disease.
When a certain percentage of a population has been vaccinated, it prevents an infectious disease from spreading. But that threshold depends on the disease.
Many myths make the rounds during flu season.
When it comes to flu, information can range from confusion about what it actually is, to speculation about how it's transmitted.
Human challenge studies can be useful to test new vaccines and are increasingly being used internationally. Yet there are several ethical issues to consider.
Deliberately infecting people with a disease-causing agent as part of carefully considered medical research can be ethically acceptable or even necessary.
If you’re going overseas with your little one, you can vaccinate them against measles early. But they’ll still need their regular jab when they turn one.
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.
You might feel a bit off after your flu shot but this doesn’t last long.
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.
They’re not perfect, but flu shots are still good to get.
AP Photo/David Goldman
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.
Buffalo relaxes in Lake Nakuru surrounded by flamingoes.
Outbreaks often affect the same areas because, once released, the bacteria continues to live as spores in the soil.
A risk analysis could offer insight into the anti-vaccination decision of some parents.
An economics risk analysis offers some insight into the modern anti-vaxx movement.
Soon, this farmer and her goats could be treated with the same vaccine.
ILRI, Zerihun Sewunet/flickr
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.
Several parents do not want their children vaccinated, for religious or other reasons.
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.
CDC/ James Gathany
Given the high burden of malaria in sub-Saharan Africa, a partially effective vaccine is considered better than none.
The Ebola virus.
The Ebola virus claimed 11,000 lives in 2014. Today, scientists may have cured the disease in guinea pigs by using antibodies.
Scientific evidence is clear: Vaccination is good for people and society. Online discussions are increasingly reflecting that reality.
Social media activity suggests that pro-vaccine evidence may be starting to outweigh anti-vaxxer disinformation.
New HIV infections continue to drive the epidemic.
Until then we need to get effective, accessible treatment for all who need it, while deploying the many prevention tools at our disposal.
Health workers in Liberia at the height of the 2014-2016 Ebola outbreak.
Four new Ebola treatments are being tried out in the DRC.
Young boy receiving polio vaccine.
A bit of humility can go a long way.
Vaccines are an important health intervention.
Effective communication strategies will be crucial if scientists want to counter the worrying anti-vaccination trend.
A health worker prepares to administer the experimental Ebola vaccine in north-western DRC.
The new Ebola vaccine is yet to be licensed but evidence shows that it protects against the strain of the virus.