Lindsay Wasson Reuters
The vaccine for measles, mumps and rubella vaccines (MMR) is painted at the International Health Services Clinic in Seattle, Washington, DC, March 20, 2019.
President Donald Trump urged people to vaccinate measles, saying on Friday that it was "so important" because of the worst year of the disease in the United States, since it was declared extorted by the country in 2000.
The current outbreaks of the United States arose after unvaccinated people traveled abroad, where large epidemics occur and brings them back to communities where some people do not want to be vaccinated, the CDC said. In New York and the Rockland County of New York, the disease spreads between a closely related Orthodox Jewish community, aimed at anti-vaxxers. An epidemic has been declared when more than three cases have been confirmed.
The measles are highly infectious, infected 90% of the non-vaccinated people who are exposed to the disease, the agency said. The measles, mumps and rubella vaccine offers the best protection. Obtaining the two recommended doses is 97% effective in preventing measles, according to the CDC.
Correction: The previous version of this story incorrectly lists the number of countries with active epidemics. Cases of measles have been reported in 22 countries this year. There are ongoing epidemics in five countries.