When a certain percentage of a population has been vaccinated, it prevents an infectious disease from spreading. But that threshold depends on the disease.
When it comes to flu, information can range from confusion about what it actually is, to speculation about how it's transmitted.
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.
An economics risk analysis offers some insight into the modern anti-vaxx movement.
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.
Four new Ebola treatments are being tried out in the DRC.
The new Ebola vaccine is yet to be licensed but evidence shows that it protects against the strain of the virus.
Q fever explained.
Instability in the DRC and Ebola's deadly properties is making it hard to contain the virus.
Researchers have tried unsuccessfully for decades to develop a malaria vaccine. Now a new approach, showing promise in mice, suggests it is possible to block mosquitoes from spreading the disease.
Progress in malaria control has stalled. Research towards an effective vaccine is underway.
New review finds that over 150 papers strongly support the view that herpes simplex plays a role in Alzheimer’s disease.
The Democratic Republic of the Congo has been hit with another Ebola outbreak. This may be the test case for how to deal with future outbreaks.
Pakistan had only eight new diagnoses of polio in 2017. The virus' days look numbered – but health workers have their work cut out for them to eradicate the devastating disease once and for all.
Flu virus mutates so quickly that one year's vaccine won't work on the next year's common strains. But rational design – a new way to create vaccines – might pave the way for more lasting solutions.
Why so-called 'Aussie flu' probably isn't from Australia and other things you need to know about the latest influenza outbreak.
Meningococcal is a rare but very serious infection that can lead to blood poisoning and brain infection. But no single vaccine protects against all the strains.