Middle Eastern Respiratory Syndrome (MERS) is a global concern and will be treated with urgency, but the World Health Organization (WHO) is not yet ready to sound the alarm.

According to NBC News, WHO announced preventative measures against MERS need to be revamped, especially in Saudi Arabia, where it originated. Scientists are not finding it easy to develop a vaccine, but fortunately enough MERS is not spreading at an alarming rate.

"Most urgent is the need to strengthen and improve infection practices in hospitals," Dr. Keiji Fukuda told reporters after a meeting of WHO's International Regulations Emergency Committee. "We saw many examples where infection control practices have broken down."

Last week, MERS arrived in the U.S. for the first time, in a man who traveled from Riyadh, Saudi Arabia to London to Indiana, via Chicago International Airport. There was even a second case confirmed in Orlando, Florida this week, as well as at least two health care workers who were in close contact with the patient.

All the evidence indicates MERS is only transferable through close human interaction meaning health care workers are most at-risk. WHO how reports 571 cases of MERS worldwide, originating in Saudi Arabia and spreading to various part of the world.

"Some people call them teachable moments," Fukuda said. "I think this is one of the moments we have before us."

CLICK HERE for NBC News' full coverage on MERS.

The WHO official said Saudi Arabia needs to enhance their preventative measures further since they have the vast majority of MERS cases, NBC News reported. The country can revamp its disease control efforts as well as be more cooperative with international scientists who want to perform studies to better understand the virus.

The Washington Post suggested the U.S. is doing a thorough job of following up with anyone who could have potentially been exposed to MERS. Health officials have done their best to contact everyone on the Indiana patient's flights to London and to Chicago, as well as the people on the bus that took him to his hometown.

Officials are also tracking down people on the Orlando patient's flights to London, Boston, Atlanta and Orlando. Neither patient went anywhere once they reached their final destination. The Indiana man was returning home and the Orlando man was from Saudi Arabia visiting family.

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