The article "Primary Measles Infection" published in the New England Journal of Medicine (Volume 394, Issue 9, Page 906, February 26, 2026) deals with primary measles infection.[1] Primary infection with measles is a highly contagious disease that spreads through the air.[2] The recommended age for the first dose of measles vaccine depends on attenuation of maternal antibodies and risk of exposure.[2] The article points to gaps in immunity in young infants.[2] An earlier or additional dose of vaccine is suggested for more effective protection.[2] MMR vaccination provides strong protection against measles.[1] Symptoms should be monitored for 21 days after exposure in unvaccinated individuals.[1]