The California Department of Public Health (CDPH) Tuesday announced that flu activity in California is widespread and at levels usually seen at the peak of the influenza season. Health officials encourage Californians to get vaccinated.

“With the increase in influenza impacting many communities across the entire state, it is important to get a flu shot now if you have not done so already,” said CDPH Director and State Public Health Officer Dr. Karen Smith. “Although influenza season usually peaks between December and February, flu activity can occur as late as May, which means it is not too late to get vaccinated.”

It takes about two weeks after vaccination for the body to respond fully. Vaccine effectiveness does vary for the different strains and year by year. Data will be available from the Centers for Disease Control and Prevention (CDC) in February about vaccine effectiveness.

“Vaccination will prevent infection in a large number of cases. If disease does occur after vaccination, the vaccine can reduce the severity of flu symptoms,” said Dr. Smith. "Getting the flu shot is still the best way to protect yourself and others from flu.”

Some people are at high risk for serious flu-related complications that can lead to hospitalization and even death including:

* Pregnant women

* Children younger than 5, but especially children younger than 2 years old

* People 65 years of age and older

* People who have certain medical conditions, such as asthma, diabetes and heart

disease.

For those at high risk of serious flu complications, getting vaccinated is especially important. It is also important for caregivers of anyone at high risk including children younger than 6 months, who are too young to get a flu vaccine.