The measles outbreak across the country has increased to 1,200 confirmed cases from 15 August, an increase of 21 cases from the previous week, according to the Centers for Disease Control (CDC).
New cases were first reported in Alaska and Ohio at the beginning of last month, bringing the total number of countries affected by the cases to 30, Reuters reported.
The outbreak is on its way to being the worst since 1992, and since measles in the US was declared "eliminated" in 2000.
On 15 August, 124 people diagnosed with measles were hospitalized. 64 people reported "complications," including pneumonia and encephalitis, according to CDC.
The cases continue to break down in New York and New York City outbreaks. In Rockland County, New York, there were 296 confirmed measles cases from the beginning of January to the end of August this year. Nearly 80 percent of the county's population did not have measles vaccines.
As of Monday, there were 654 confirmed measles cases in New York City since September 201
However, Monday's update is not the worst jump the US has recorded on a weekly basis. In the first week of June, 41 new cases were diagnosed. On April 22, the CDC announced that there were an increase of 71 new cases compared to the previous week. New York City; Washington; Los Angeles County; El Paso, Texas; and Wyoming County, New York.
Earlier this month, the United Kingdom also lost the name "free of fibers" from the World Health Organization. There were 489 confirmed cases of the disease in the country on 7 August, compared with 285 cases in 2017, Newsweek reported.