Avian flu strains tend to only affect birds, but the current outbreak has spread to cattle and – in rare cases – people. The ...

Soldiers with influenza at the hospital in Camp Funston, Kansas, in 1918. Camp Funston is where the influenza epidemic first made a major appearance. Troops from the camp carried the virus to ...

The flu is a contagious viral infection of the respiratory system that affects the nose, throat and lungs. It is caused by influenza viruses. Symptoms of mild flu infections can resemble those of ...

Kennedy Jr. falsely claiming that vaccines caused the 1918-1919 influenza pandemic known as the Spanish flu. One Facebook post (archived) with around 105,000 reactions at the time of this writing ...

Kennedy Jr. said he had read "articles" and "evidence" linking the start of the 1918-1919 influenza pandemic, known as the Spanish flu, to vaccine research. Kennedy described these articles as "strong ...

there have been a little more than 900 known cases globally since 2003 – nearly 50 per cent of these cases have been fatal – a mortality rate about 20 times higher than that of the 1918 flu ...

Workers who are in frequent contact with potentially sick animals are at high risk of bird flu infection. Costfoto/NurPhoto via Getty Images ...

When a disease-causing pathogen such as a flu virus is already adapted to infect a particular animal species, it may eventually evolve the ability to infect a new species, such as humans ...