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.
Vaccination is not to be taken for granted.
A new version of the HPV vaccine Gardasil protects against nine types of the virus, and is already being used overseas.
To tackle diseases like meningitis, African governments must find fresh ways to fight for lower cost vaccines.
Most immunisation campaigns continue to primarily focus on infants and children, but almost 4 million Australian adults are not vaccinated against preventable diseases.
Whilst most parents do vaccinate, health professionals often find it difficult to talk with those who are hesitant or decline. A new resource provides information and communication support.
Speaking on the ABC program Insiders, One Nation leader Pauline Hanson suggested there are tests available to see if children will have an adverse reaction to vaccinations. We asked three experts.
Running an effective mass immunisation campaign, vaccinating children in Nigeria against measles is a logistical nightmare.
Our immune system protects us but when it comes to some mosquito-borne disease, it can work against us. What are the implications for the development of a Zika virus vaccine?
From November 1, the shingles (herpes zoster) vaccine will be available for free to people aged 70 to 79 years. So how and why do you get shingles, and who should be vaccinated?
The Commonwealth government's "no jab, no pay" legislation is disadvantaging migrant children. Many families are having essential payments withheld despite their children being vaccinated.
Every year hundreds of thousands of children die from vaccine-preventable diseases. Africa leaders could change this if they improved vaccination efforts.
Overall rates of vaccine objection have remained largely unchanged since 2001.
Bats can carry some of the deadliest diseases known to affect humans and yet they don't seem to get sick. So what can we learn from a bat's immune system?
Despite Nigeria's success in eradicating polio, it is struggling to get a grip on mother and child vaccinations.
As more vaccines have been developed, the challenge of delivering them with minimal pain and number of visits to the doctor has increased. Needle-free vaccinations might help.
Despite the success of mass immunisation campaigns in Africa, the continent still lags behind in meeting global vaccination targets.
The immune system does such a good job most of the time that we only really think about it when things go wrong. But to provide such excellent protection, it must constantly learn.
Recent polio outbreaks in Ukraine and Mali, caused by a vaccine-derived form of poliovirus, don't mean the vaccine isn't working. On the contrary, they are a reminder to keep up vaccination rates.
Eradicating the last 1% of polio cases in the world requires an endgame plan centred on immunisation and surveillance.