The salmonella bacteria can cause symptoms including diarrhea, fever and stomach cramps, according to the CDC.
Twenty children died in just 24 hours over the weekend, as authorities deal with one of the worst outbreaks in recent years.
The anti-vaccine lobby has only grown more powerful as measles spreads across the U.S. Unless congressional action is taken, other vaccine-preventable diseases are likely to rise.
764 cases of measles have been reported across the country since January 1.
Anti-vax parents are undermining the public good, hurting other people and also costing the economy millions of dollars.
National Chief Medical Officer Merlene Fredericks-James said the risk of an outbreak was too great to allow staff or guests to disembark.
"I worry about the potential student who maybe was unable to be vaccinated due to an underlying medical problem, such as people with immune deficiencies."
Public health officials in both states have encouraged citizens to get vaccinated against the highly contagious liver infection.
Those who fail to obey the vaccination order face a fine of up to $1,000.
Measles cases have been confirmed in 12 states.
With measles outbreaks in multiple states and growing backlash against the anti-vaccination movement, Washington Health Secretary John Wiesman urged lawmakers and concerned Americans to take action.
Many great encounters in world history, including Cortés's clash with the Aztec empire, had less to do with weaponry, tactics and strategy than with the ravages of disease.
Mumps, which the MMR vaccine can prevent, can cause complications, including brain swelling and meningitis.
Health officials in New York state have launched an "aggressive, multipronged" attack against the disease.
Scientists identified anti-vaccination hot spots in 12 states.
Until the 1990s, the disease would kill 500,000 children every year.
Last year, the U.S. saw the second-highest rates of measles since the disease was eliminated in 2000, partly due to parents not getting their children immunized.
The outbreak comes after 2018 was found to be the second worst year for cases of measles in the U.S. since 2000.
Hundreds of thousands of pounds of products were affected by the latest recall.
The key to knowing if romaine lettuce is safe to eat is to check the harvest date and origin.