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.
The media suggests we’re in the midst of a horror flu season, but there are nuances to consider.
The headlines paint a picture of a frightening flu season. While this season set in earlier than usual, it's not necessarily more severe than previous years.
It’s quicker to use hand sanitiser than soap and water, which means people might be more likely to use it.
Washing your hands helps protect against the flu. So it makes sense for governments to make hand sanitisers available in public places.
The impact of the flu on a population can be measured by looking at figures including cases, hospitalisations and deaths.
Headlines about this year's flu season have been alarming. It's true, we are having a serious season – but the data doesn't indicate it's the worst one we've ever had.
Early indications are that the vaccine has been a reasonably good match in the 2019 season.
The flu vaccine is built on the strains expected to circulate in a given year. While the majority of strains circulating this year are matched in the vaccine, there's one strain we didn't predict.
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.
You might feel terrible. But your runny nose, sore throat and aches are signs your body is fighting the flu virus. And that’s a good thing.
How can a tiny flu virus make you feel so bad, all over? Here's what's behind your high temperature, muscle aches and other flu symptoms.
Children are more likely than adults to catch and spread influenza.
Children's immune systems are more vulnerable to the flu; even kids who are otherwise healthy can develop complications. The best way to protect children is by having them vaccinated.
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.
The new approach to keep research ready to go could be useful for other health emergencies, including other infectious diseases.
All too often, researchers around the world act in competition when trying to answer research questions in an emergency situation, such as outbreaks of the flu. The UK is trialling a new approach.
The flu comes on rapidly and symptoms get worse over the first few days.
The 2018 flu season was mild, while 2017 was a particularly bad year. It's impossible to predict what the 2019 flu season has in store, but we've seen more cases so far this year than usual.
There are three types of flu vaccine available in Australia.
Image Point Fr/Shutterstock
The adjuvanted flu vaccine is free for over-65s and offers better protection than the standard vaccine. Here's what the research says.
What goes up must come down, and that includes the protection the flu vaccine offers against influenza.
Protection wanes after four or five months, so for most people, it makes sense to get a flu shot in mid to late May or early June so you're protected when the flu season peaks in August or September.
Little yellow-shouldered bat.
Scientists identify the risk of bat flu spreading to humans.
Women were at the forefront of managing the influenza pandemic.
AUSTRALIAN WAR MEMORIAL
We commemorate the centenary of the end of WW1, but victims of a more deadly threat are rarely remembered. Let's change that.
Californians in June 2015 protest a bill that did away with personal belief exemptions for vaccinating children before they enter school.
Rich Pedroncelli/AP Photo
Vaccination rates for children in some parts of California are down, despite a law that narrowed exemptions. Here's a look at why people refuse to listen to evidence when it comes to the flu vaccine.
The flu virus changes over time – which is why you need a different flu shot each year.
Important research questions can almost always be answered better with a combination of methods – where both quantitive and qualitative data play a role.
The flu shot decrease the risk of heart attacks in healthy individuals, according to research. Here, pipettes containing immune cells for testing against possible flu vaccines are seen at the National Institutes of Health in Bethesda, Md., in 2017.
(AP Photo/Carolyn Kaster)
Your risk of a heart attack increases 600 per cent within a week of catching the flu. The flu shot decreases that risk, whether you catch the flu or not.
A nurse in Atlanta reaches for a vial of vaccine to prepare for an injection.
David Goldman/AP Photo
The flu shot is most effective if you receive it by the end of October. With 80,000 deaths from flu during last year's flu season, a doctor explains why you should act now.