Flu epidemic: Experts explain the reasons behind Australia's bad season

[Emily]

http://www.abc.net.au/news/health/2017-09-28/flu-epidemic-your-questions-answered/8992884

[h=1]Flu epidemic: Experts explain the reasons behind Australia's bad season[/h] By Cathy Johnson and James Bullen



... [h=2]Why has it been a bad flu season?[/h] A key factor seems to be that the flu vaccine has been less effective than expected this year.
Preliminary data suggests it offered only 15 to 20 per cent protection, Professor Collignon says.
This means as many as 85 per cent of people who were vaccinated and then exposed to the virus still got infected.
"For whatever reason, the vaccine has been very ineffective this year."...