That means it is still possible to get a less common strain of the flu, as many people did two years ago. (sciencedaily.com)
It's not too late to get vaccinated against the most common strains expected this year. (sciencedaily.com)
Currently a new vaccine against flu is developed every year, in an attempt to respond to recent common strains in circulation, including those which cross into humans from other species. (telegraph.co.uk)