Measles is one of the most contagious viruses in the world, and can live on surfaces or suspended in the air for two hours. Public health recommendations call for children to receive their first shot to protect against it between 12 months and 15 months old, and a second round between the ages of 4 and 6.

A newborn with measles is among the cases reported in the growing West Texas outbreak, Lubbock public health officials say. Experts say the case serves as a reminder that the disease can be especially dangerous for pregnant women and very young children.

RFK Jr. has claimed measles can be treated with vitamin A and that severe infection is linked to poor diet. But many experts who spoke with ABC News disagreed.

Kennedy Jr. was confirmed as America’s secretary of health and human services, neutral observers might have asked themselves: Would it be possible for a lawyer who had questioned the safety of childhood vaccinations for two decades to look at the available data and reconsider his views?