Public health did note some likely immune groups, such as those born before 1957, those who are certain they have already had the disease and those up-to-date on vaccines - one dose for children up to four years old and two doses for those four and older.
The new measles cases in Houston bring the total number of cases in Texas to six so far in 2019.
The United States outbreaks, which are defined as 3 or more cases, are in New York State, New York City and Washington State.
To prevent illness, one dose of measles-mumps-rubella, or MMR, vaccine must be given to unimmunized people within 72 hours of exposure.
"Getting vaccinated protects you as well as those who are unable to receive vaccines due to age or medical conditions", said Michelle Beall, Pharm.D., Clinical Pharmacist, Brookshire Grocery Company.
Measles is highly contagious, and if one person has it, 9 out of 10 people around that person will also become infected if they have not yet vaccinated, officials said. Measles starts with fever, runny nose, cough, red eyes, and sore throat followed by a rash that spreads over the body. Officials say they had stayed at home and in contact with health officials.
In 2018, there were 17 outbreaks and about 350 diagnosed cases of measles in the U.S.
Meghan Markle's friends concerns for her
It was raining and muddy outside, so the dogs got all dirty, and she's wiping them off with towels. Meghan's friends also voiced concerns about how the additional stress is affecting her.
"Measles is a highly contagious respiratory disease caused by a virus, which spreads to others through coughing and sneezing", Umair Shah, the executive director of Harris County Public Health said in a statement confirming the new cases in Houston.
"Our vaccination rates are not so low that I think we are going to be like Italy or Romania that had thousands of cases previous year but we could have a few hundred cases", Ludke said.
According to the Bell County Health District, there were four possible cases under investigation.
Houston Rockets acquire Iman Shumpert in three-way trade
For the Cavs, they're scooping up yet another future draft pick for taking on bad contracts and sending out a useful bench scorer. The Cavaliers will receive the contract of Brandon Knight , Marquese Chriss and a lottery protected first round pick in 2019.
Wizards sending Porter Jr. to Bulls for Parker, Portis
The trade also ends a failed experiment for the Bulls after Parker signed a $40 million, two-year contract with his hometown team. Expect the Wizards to remain active through Thursday's deadline to shed more salary and get out of the tax entirely.
Eden Hazard to tell Chelsea FC about Real Madrid decision
He could add to his medal haul at Stamford Bridge on Sunday when Chelsea face Manchester City in the Carabao Cup final. Chelsea are reportedly considering Napoli forward Lorenzo Insigne as a potential replacement for Eden Hazard .
Raiders in talks to play in San Francisco next season
If the 49ers choose to decline waiving their territorial rights, the Raiders may find themselves between a rock and a hard place. In 2014, the San Francisco 49ers left Candlestick Park in San Francisco and head south to a new stadium in Santa Clara.
At least five die in auto bombing at Mogadishu mall
Al-Shabaab jihadists seeking to topple the internationally-backed government regularly carry out attacks in the Somali capital . Last month, the terrorist organization killed 21 people in a hotel in Nairobi, Kenya.
Measles case confirmed in Denton County
However, there are 11 people who display symptoms of measles and are awaiting the results of blood work to confirm the diagnosis. The mainstream of those infected are children, who have not been vaccinated against the disease, executives said.