Measles outbreaks: Protecting your patients during international travel

What is going on internationally?

Figure 2 lists the top 10 countries with current measles outbreaks.

Most countries on the list may not be typical travel destinations for tourists; however, they are common destinations for individuals visiting friends and relatives after immigrating to the United States. In contrast to the United States, most countries with limited resources and infrastructure have mass-vaccination campaigns to ensure vaccine administration to large segments of the population. They too have been affected by the COVID-19 pandemic. By report, at least 41 countries delayed implementation of their measles campaign in 2020 and 2021, thus, leading to the potential for even larger outbreaks.⁴

Progress toward the global elimination of measles is evidenced by the following: All 194 countries now include one dose of measles in their routine schedules; between 2000 and 2019 coverage of one dose of measles increased from 72% to 85% and countries with more than 90% coverage increased from 45% to 63%. Finally, the number of countries offering two doses of measles increased from 50% to 91% and vaccine coverage increased from 18% to 71% over the same time period.³

What can you do for your patients and their parents before they travel abroad?

• Inform all staff that the MMR vaccine can be administered to children as young as 6 months and at times other than those listed on the routine immunization schedule. This will help avoid parents seeking vaccine being denied an appointment.
• Children 6-11 months need 1 dose of MMR. Two additional doses will still need to be administered at the routine time.
• Children 12 months or older need 2 doses of MMR at least 4 weeks apart.
• If yellow fever vaccine is needed, coordinate administration with a travel medicine clinic since both are live vaccines and must be given on the same day.
• Any person born after 1956 should have 2 doses of MMR at least 4 weeks apart if they have no evidence of immunity.
• Encourage parents to always inform you and your staff of any international travel plans.

Moving forward, remember this increased global activity and the presence of inadequately vaccinated individuals/communities keeps the United States at continued risk for measles outbreaks. The source of the next outbreak may only be one plane ride away.

Dr. Word is a pediatric infectious disease specialist and director of the Houston Travel Medicine Clinic. She said she had no relevant financial disclosures.

This article was updated 6/29/22.

References

1. Patel M et al. MMWR. 2019 Oct 11; 68(40):893-6.

2. Seither R et al. MMWR. 2022 Apr 22;71(16):561-8.

3. Gastañaduy PA et al. J Infect Dis. 2021 Sep 30;224(12 Suppl 2):S420-8. doi: 10.1093/infdis/jiaa793.

4. Centers for Disease Control and Prevention. Measles (Rubeola). http://www.CDC.gov/Measles.