According to the Iowa Department of Public Health (IDPH), influenza testing decreased at surveillance network sites during the first week of 2015 – a sign that the virus may have peaked in Iowa for the current season. The Iowa influenza season typically peaks in February but can last until May.

All three strains of influenza currently circulating in Iowa -- A(H3N2), A(H1N1) and B -- are covered by this year’s vaccine. However, some of the A(H3N2) viruses have “drifted,” or mutated, into a new strain. Despite the mutation, the current vaccine should still provide partial protection.

“Vaccination is still the best method of prevention,” according to Wade Aldous, director of the Disease Control Division at the State Hygienic Laboratory. “Even at this stage in the season, it’s still advisable to get the vaccine,” Aldous said.

Taking additional steps like staying home when ill, cleaning hands frequently and covering coughs and sneezes will also help reduce transmission of the virus. IDPH has confirmed three influenza-related deaths in children under the age of 18. Most of those hospitalized during the current influenza season have been adults 50 years and older.

Anyone displaying flu symptoms should immediately see their health care provider because antiviral drugs prescribed to combat the flu are most effective if administered within 48 hours of symptom onset.