By Jorge Casuso

October 10, 2019 -- A person with measles visited two Santa Monica locations Monday, potentially exposing others to the contagious disease, Los Angeles County Health officials said Monday.

The infected individual visited an office complex at 3201 Wilshire Boulevard between 11:35 a.m. and 3:40 p.m. and Erewhon Market at 2800 Wilshire between 3 and 5:30 p.m.

Those who visited those places at the times listed could be at risk of developing measles over the next 21 days, County health officials said.

They should review their immunization records and monitor themselves for symptoms, which include fever; cough; red, watery eyes, and, finally, a rash, officials said.

“Measles is spread by air and by direct contact even before you know you have it,” said L.A. County health officer Dr. Muntu Davis.

There have been 18 cases of measles among LA County residents this year and another 11 people traveled through the county while sick with the disease, health officials said.

Most of those who contracted he disease were not immunized, officials said.

The most recent case marks the fourth patient known to have visited Santa Monica with the infectious disease since August 2018.

In July, a LA County resident who contracted the measles after traveling abroad visited two Santa Monica locations while infected ("Person Infected with Measles Visited Two Santa Monica Locations Last Week," July 24, 2019).

In January, County health officials warned that visitors to the Santa Monica Pier and Blue Plate Taco restaurant may have been exposed to measles in late December ("Person Infected with Measles Visited Santa Monica Pier Restaurant," January 14, 2019).

And last August, heath officials issued a warning after a tourist infected with the measles visited six Santa Monica establishments ("Infected Tourist Prompts Measles Warning in Santa Monica," August 20, 2018).

The infected person who visited Santa Monica Monday also visited three other locations on the Westside.

Last Friday the patient visited 3756 Santa Rosalia Drive in Los Angeles between 5:45 and 9:15 p.m.

On Saturday the person visited the Culver City ArcLight Cinemas between 5 and 9 p.m. and AR Cucina Restaurant in Culver City between 7:30 and 11 p.m.

"Considered one of the most contagious diseases in the world, measles spreads through coughing and sneezing but can linger in the air for up to two hours after an infected person leaves the room," health officials said.

This year some 1,250 people have been diagnosed with measles in the U.S., compared to 372 in all of 2018.