Measles cases surge in US as it considers vaccine changes | REUTERS

Key Concepts

• Measles cases
• Vaccination rates
• Misinformation and disinformation
• Endemic measles
• Global measles outbreaks
• Measles severity and complications
• Vaccine efficacy

Increase in Measles Cases in the US

• Current Situation: Measles cases are rising across the United States, coinciding with increased social gatherings during the holiday season. Experts are concerned about the spread of this highly infectious virus.
• Statistics: As of the current year, the CDC has reported nearly 1,800 confirmed measles cases in the US. This represents approximately 46 different outbreaks, which is triple the number observed in 2024. The outbreaks are also lasting longer.
• Contributing Factor: Dr. Rebecca Sunenshine, Medical Director of the Arizona State University Health Observatory, notes that the increase in measles cases aligns with a decline in measles vaccination rates.
• Reasons for Decline: While the exact reasons for the drop in vaccination are unclear, Dr. Sunenshine points to significant misinformation and disinformation surrounding vaccines.
• Specific Misinformation: Robert F. Kennedy Jr. has been cited for repeatedly making misleading claims about vaccines, including the false assertion that the measles vaccine contains cells from aborted fetuses and that the measles vaccination is ineffective.

Global Measles Trends and Concerns

• US Tipping Point: Scientists have warned that the US is at a critical juncture, facing the potential return of endemic measles, a disease that was declared nationally eradicated in 2000.
• Global Increase: The US is not alone in experiencing a rise in measles. A World Health Organization (WHO) report indicates that global measles cases increased by 8% last year compared to pre-pandemic levels in 2019.
• Widespread Outbreaks: 59 countries have reported larger, disruptive measles outbreaks.
• Vaccination Coverage Correlation: The WHO report highlights that measles is often the first disease to resurge when vaccination coverage drops.
• Canada's Status: Canada recently lost its measles elimination status following a year-long outbreak that it failed to control.
• Historical Global Decline: Despite recent increases, the WHO report also showed a significant 71% decline in global measles cases between 2000 and 2024.

Severity and Preventability of Measles

• Health Risks: Doctors emphasize that measles can cause severe health problems and can be fatal.
• Hospitalization Rates: In the current outbreak, one in five children under five years old has been hospitalized.
• Long-Term Complications: Measles can lead to permanent deafness and neurological damage.
• Mortality Rate: Approximately one to three individuals out of every thousand infected will die from the disease.
• Importance of Vaccination: Due to its severity, vaccination is crucial for preventing measles.
• Vaccine Efficacy: Measles is highly preventable. Countries achieve this when they reach 95% coverage with two doses of the measles vaccine, which are 97% effective.