Angela Solis, a pharmacist at Martin's Wellness and Compounding Pharmacies, said measles is the most contagious respiratory illness. She said interest in the MMR vaccine has increased at the pharmacies since the Texas measles outbreak began.

NBC 5 is taking a closer look at measles vaccinations in North Texas, including which county has seen the biggest decline and which DFW residents may need a booster. State data shows that thousands fewer students are receiving the measles vaccine in North Texas compared to just a few years ago.