The spread of measles is leading to the urgency of public health in New York and the need for vaccines

According to the CDC, the country faces the biggest measles outbreak in five years. New York City Mayor Bill de Blasio has declared a public health emergency, requiring mandatory vaccination of adults and children exposed to the virus. CBS News' Tony Dokoupil reported in Brooklyn and Dr. Eric Cioe-Penã joined CBSN's Elaine Quijano for further review.