Ebola Outbreaks: Can Routine Vaccines Prevent Measles?

Why can interrupted vaccination increase measles risk?

Concern about Ebola can have consequences beyond the infection itself when families miss routine preventive care. WHO explicitly advises that childhood immunization should continue during Ebola outbreaks wherever it can be provided safely. Interruptions can increase susceptibility to measles, polio and diphtheria, adding illnesses that vaccination could have prevented. [WHO guidance on Ebola and routine vaccination](https://www.who.int/news-room/questions-and-answers/item/ebola-vaccines).

Measles illustrates the danger because it spreads through the air and can remain infectious in a shared space for up to two hours. Complications include pneumonia, severe diarrhea and brain inflammation. WHO recommends two vaccine doses, yet estimates that only 77% of children worldwide received both doses in 2025. That global figure describes an existing protection gap; it does not measure the impact of the current Ebola outbreak. [WHO measles fact sheet](https://www.who.int/news-room/fact-sheets/detail/measles).

How can vaccination services continue safely during an Ebola outbreak?

WHO issued dedicated guidance in August for planning routine immunization during the Bundibugyo virus disease outbreak, a form of Ebola disease. The document addresses vaccination planners, health workers and infection prevention teams, with operational checklists to support implementation. Its purpose is to make essential vaccination possible under outbreak conditions; it should not be interpreted as a guarantee that every clinic or vaccination session is safe without assessment. [WHO interim immunization guidance](https://www.who.int/publications/i/item/B09873).

Ebola prevention in health facilities depends on interrupting contact with infectious blood, body fluids and contaminated materials. Appropriate protective equipment, hand hygiene, safe injection practices and prompt separation and assessment of suspected cases are central safeguards. These precautions require equipment, staffing and training, alongside explanations that families can understand. A person with possible Ebola exposure and compatible symptoms needs prompt medical assessment through the designated outbreak service, rather than joining a routine vaccination queue. [WHO Ebola disease fact sheet](https://www.who.int/news-room/fact-sheets/detail/ebola-disease).

What should families do if a child has missed vaccinations?

A delayed appointment does not usually erase the benefit of previous valid doses. CDC catch-up guidance states that a vaccine series does not need to be restarted simply because time has passed. Clinicians instead assess the child's age, documented vaccinations, minimum intervals and vaccine-specific limits. The practical next step is to bring available records and request an individualized catch-up plan using the national schedule. Some vaccines have age restrictions, so families should seek advice promptly rather than assume every missed dose can be given later. [CDC catch-up immunization guidance](https://www.cdc.gov/vaccines/hcp/imz-schedules/child-adolescent-catch-up.html).

Families also need a clear distinction between routine childhood vaccines and vaccines used specifically against Ebola. Measles and polio vaccines do not protect against Ebola, and an Ebola vaccine does not replace routine immunization. WHO's September guidance states that protection from the licensed Ebola vaccine against Bundibugyo virus disease remains uncertain in humans. Maintaining established childhood vaccination therefore remains a separate public health priority, alongside outbreak precautions and research into Ebola-specific protection. [WHO Ebola vaccine questions and answers](https://www.who.int/news-room/questions-and-answers/item/ebola-vaccines).