Illinois has confirmed its first human case of West Nile virus this year, health officials say.

The person, who lives in southern Illinois, was hospitalized with complications from the mosquito-borne virus, according to the U.S. Centers for Disease Control and Prevention (CDC).

This is the earliest West Nile virus case reported in Illinois since 2016. Health officials say it's a sign that mosquito season is off to an early start and that people should take steps to protect themselves, WGN reported.

"The fact that we are seeing the first human case of West Nile virus so early in the season serves as a timely reminder - especially for seniors and those with weakened immune systems - to protect yourself from illnesses caused by mosquito bites," Dr. Sameer Vohra, director of the Illinois Department of Public Health (IDPH) said.

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