Despite vaccines being effective, breakthrough measles infections can occur due to several factors:

• Vaccine Efficacy: No vaccine is 100% effective, and some vaccinated individuals may still contract measles.
• Waning Immunity: Immunity from the measles vaccine can decrease over time, leading to susceptibility.
• Virus Variants: Emerging strains of the virus may evade vaccine-induced immunity.
• Public Health Concerns: Lower vaccination rates can increase the spread of the virus, putting even vaccinated individuals at risk.

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