The Argentine Ministry of Health has announced a significant change to the national vaccination calendar by advancing the administration schedule for the second dose of the triple viral vaccine, which protects against measles, rubella, and mumps. According to the new guidelines formalized in Resolution 339/2026, the second dose is now to be administered between the ages of 15 and 18 months for all children born after July 2024. This change alters the previous vaccination plan that was tied to school entry requirements, ensuring that children receive this important vaccination earlier in life.

This adjustment reflects a broader effort by the government to enhance public health measures and ensure higher vaccination coverage among young children. The Ministry's decision is backed by ongoing health assessments, which indicate the need for timely vaccinations to prevent outbreaks of these contagious diseases. The first dose will still be administered at the age of 12 months, allowing for a structured approach to immunization within the critical early development window.

The implications of this policy change are multifaceted, as it not only aims to protect public health by reducing the risk of vaccine-preventable diseases but also aligns with international health guidelines. By redefining the vaccination schedule, the government also hopes to foster greater compliance among parents and caregivers, ensuring that children are vaccinated within the ideal time frame, which can ultimately lead to healthier population outcomes.