– Influenza A (H1N1) has become regular seasonal flu since 2009, which regularly circulates. That is the case with a pandemic, the virus continues to circulate, "says adviser Birgitte Klüwer from the department of the flu at the Norwegian Institute of Public Health.
When the pandemic broke out, the infection was associated with serious diseases and the worst cases of deaths for some in some groups among us. Almost people went through the men's house to get vaccinated to reduce eruption.
The reason why no one speaks particularly about the serious threat of swine flu infection is that the virus is still coming. Some of them gained immunity because they were previously exposed to the virus.
"The body learns to defend against individual viruses" – says Klüwer.
This year's vaccine for risk groups contains the components of two types of influenza A and one influenza B, and A (H1N1) is one of them.