They recorded a high number of measles cases, especially in the ranks of members of the ultra-Orthodox Jewish community.
"Vaccination is very important" Trump told reporters at the White House. "Everyone should receive a dose (vaccines) " he said.
In the United States, a record 695 cases of this disease have been recorded since the beginning of this year.
Several US public health institutions are trying to prevent the spread of this virus and the outbreak of an outbreak due to the increase in measles in the United States. For example, more than 200 students and staff from the University of California at Los Angeles (UCLA) and California State University (CSU) must be quarantined to suspect they may be measles.
They recorded a high number of measles cases, especially in the ranks of members of the ultra-Orthodox Jewish community. Many of them refuse vaccination, writes AFP.
According to the agency, the spread of measles may be largely a disinformation campaign in which parents refuse to vaccinate their children.
In the past, Trump had expressed suspicion about the efficacy of the vaccines. In 2012 and 2014 on Twitter several times misrepresented the vaccination relationship with childhood autism.