The immune system has to establish which cells belong to us and which are foreign, no mean feat.
Nobel laureate Peter Doherty explains immunity.
An increasingly mobile global population is making it easier for infectious diseases to spread.
Travel allows us to see the world – and bring foreign diseases home. Here's why spreading disease is easier than ever.
Isolated peoples’ immune systems haven’t learned how to evade bugs.
There are numerous examples of the havoc infectious diseases can play on communities that have not previously been exposed to them.
The flu shot is free for at-risk groups, and available to others for around $10-$25.
While not perfect, the seasonal flu vaccine is the best way to protect against influenza. There are a few changes to the flu vaccine and what is available this year. Here's what you need to know.
Young children catch and spread the flu more than any other age group.
The flu vaccine isn't perfect but it's the best way to protect against these potentially harmful viruses. Most children aged six months to five years are eligible for a free vaccine in 2018.
A line of AR-15s are on display at gunmaker Daniel Defense in Georgia.
AP Photo/Lisa Marie Pane
The gun industry has been virtually immune from liability for the deaths and injuries caused by its products since 2005. Can this change?
Could the yearly flu shot become a thing of the past?
AP Photo/Darron Cummings, File
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.
It's still unclear whether Zimbabwe will manage an effective transition to participatory democracy and freedom. And the current signs are not encouraging.
Using the right metaphor in science is important.
Parents are concerned combination vaccines, which protect against several diseases at once, can be too much for a young immune system to cope with.
Vaccines against multiple diseases in one jab strengthen kids' immune systems, not weaken them. Here's why we shouldn't fear these combination vaccines.
It’s the ability of our immune system to remember past infections, and pass this memory on to our kids, that allows us to survive infectious diseases.
With so many microbes capable of hijacking and destroying us, how are we, as a species, still enduring?
What if it wasn’t back to the drawing board every year for a new flu shot?
Flu virus mutates so quickly that one year's vaccine won't work on the next year's common strains. But a new way to create vaccines, called 'rational design,' might pave the way for more lasting solutions.
Revellers at a carnival in Sao Paulo wear mosquito masks in a reference to the
Aedes aegypti mosquito, which can spread dengue and Zika on February 4, 2016.
Emerging research suggests that preexisting immunity to dengue virus, which is endemic in South America, could make a subsequent Zika infection worse.
South Africa’s planned withdrawal from the ICC is considered a detraction from Nelson Mandela’s “inspiring legacy”.
The ICC has made important advances by investigating cases outside Africa and completing ones that further define what is not allowed in war. South Africa’s withdrawal is concerning, but not fatal.
A vial of the Zika Virus Investigational DNA Vaccine from the NIH.
NIH Image Gallery/Flickr
The long vaccine development process is focused on ensuring production of the safest and most effective vaccine for use.
There's an effective vaccine – but it's not always the best option.
Most people know sleep is important. But few know a lack of it can put us at greater risk of heart disease and obesity.
Not getting enough quality sleep can have significant implications for health.
Our modern crops need some help in the immunity department.
Andy / Andrew Fogg
Modern agriculture is synonymous with monoculture. That lack of diversity is bad news for plants' natural immune defenses. Researchers are figuring out how to help plants fend off microbes – without pesticides.
The only thing standing between invaders such as bacteria, viruses, parasites and fungi and our devastation is our immune system.
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.
The immune system protects us from the constant onslaught of viruses, bacteria and other types of pathogens we encounter throughout life. But it can sometimes misbehave.