Many people not getting tested for measles or don't have access to test for highly infectious disease as outbreak area expands.

Health experts say driving up vaccination rates in affected areas is the most effective defense against this disease.

Measles cases in Texas are rising, with five new counties now added to the outbreak zone, the Texas Department of State Health Services said on Monday.

Texas confirmed 505 measles cases in 22 counties on Tuesday. About 70% of these cases were confirmed in children under the age of 18.

A second child in Texas has died from measles, one of the world’s most contagious illnesses, which was declared eliminated from the United States in 2000, several decades after the introduction of a highly effective vaccine.

The Texas Department of State Health Services said Tuesday that the number of measles cases in the outbreak that began in January has risen to 505 confirmed infections with 57 hospitalizations. Based on the most recent data,

Texas child dies from the preventable disease, HHS Secretary Kennedy is now urging measles vaccination yet still touting unproven treatments.

West Texas is in the middle of a still-growing measles outbreak with 481 cases Friday. The state expanded the number of counties in the outbreak area this week to 10. The highly contagious virus began to spread in late January and health officials say it has spread to New Mexico,

His previous comments stated that the measles vaccines were "unnecessary and risky." Over 600 cases have been confirmed by the Center for Disease Control in a recent publication dated April 3. There have been two confirmed deaths in Texas because of measles,