Washington state officials warned of a "sharp increase" in whooping cough cases compared to this time last year, mirroring a nationwide trend.

Washington state is experiencing a spike in whooping cough cases with nearly 1,200 reported cases so far this year, that's up from 51 cases reported this time last year, according to the Washington Department of Health (DOH).

This year could be a decade-high for whooping cough cases in Washington state, according to numbers by the state Department of Health.