ieExplains: Here's what you need to know about the new flu strain in Ireland 

The winter flu season has started earlier than usual in Ireland, with 'highly virulent' new strain — H3N2 subclade K — causing concern

The flu vaccine is available from GPs and pharmacies and is free to those aged 60 or older, children aged from two to 17, and if you are a healthcare worker or pregnant.

The winter flu season has started earlier than usual in Ireland and doctors are urging people to get vaccinated.

A "highly virulent" new strain — H3N2 subclade K — is causing increased concern. Here's what you need to know.