The number of zero-dose children (14.3 million) decreased 21%, from 18.1 million in 2021, but was still 11% higher than the 12.9 million in 2019.
In one of the cases, the patient was unvaccinated and had traveled internationally.
Since the middle of May, 1,200 child deaths from measles and malnutrition have been reported from war-torn Sudan.
Increases in countries that already had good momentum overshadowed struggles other countries had with regaining lost ground.
The WHO reports 316 new mpox cases and 2 new deaths, and the UK warns about a rise in measles transmission.
Seventy-two percent of respondents say the benefits of MMR vaccines are very high or high, and 64% say the risk of side effects is very low or low.
The country has already confirmed 49 measles cases, compared with 54 for all of 2022.
The COVID-19 emergency committee will meet on May 4 to assess if the situation still warrants a public health emergency of international concern.
A measles outbreak that began late last year in western Nepal has grown to 690 cases, the WHO says.
The case involves an unvaccinated person who attended a religious gathering in Kentucky of about 20,000 people.
