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Influenza-associated deaths among children younger than 18 years of age and human infection with a novel influenza A virus are nationally notifiable conditions reported through the National Notifiable Diseases Surveillance System (NNDSS).

Seasonal influenza viruses circulate in Hawaii year-round, but are most common during the fall and winter months. The exact timing and duration of each flu season varies from year to year, but influenza activity usually begins to increase during October.

Hawaii is bracing for 50,000 to 70,000 cases of flu this year and the surge in influenza is being complicated by fears of the new virus that started in China.

The committee recommended that the quadrivalent formulation of cell- or recombinant based influenza vaccines for the U.S. 2020-2021 influenza season contain the following: an A/Hawaii/70/2019 (H1N1) pdm09-like virus; an A/HongKong/45/2019 (H3N2)-like virus; a B/Washington/02/2019- like virus (B/Victoria lineage);

Notably, in the tropics, it appears the the flu is just as prevalent over the course of a year as it is in the US during the winter. The number of cases is roughly the same in the tropics as it is here, just spread out over a longer period, meaning you could catch the flu at almost any time.

Although the influenza virus can circulate throughout the year, it's most common during the winter months. If you're experiencing flu-like symptoms during the summer months, it's unlikely that you have the flu. The best way to prevent getting sick over the summer months is to practice good health habits.

Hawaii is bracing for 50,000 to 70,000 cases of flu this year and the surge in influenza is being complicated by fears of the new virus that started in China.

The final data on flu season 2019/2020 was released by the CDC in April as COVID-19 continued to spread throughout the United States. Between October 1, 2019 and April 4, 2020, the flu resulted in: 39 to 56 million illnesses. 410,000 to 740,000 hospitalizations.