Officials in West Coast state sound alarm after traveler diagnosed with highly contagious viral disease

Officials in West Coast state sound alarm after traveler diagnosed with highly contagious viral disease

Canadian visited several popular public spaces between April 30 and May 3

Individuals can be infected with measles for days without seeing a rash. (iStock)

A person diagnosed with measles from Canada visited multiple public locations in Washington state while contagious. (Reuters/Chris Helgren)

Measles vaccinations are highly effective in preventing the disease. (Raquel Natalicchio/Houston Chronicle via Getty Images)