Children typically receive their first measles vaccine around their first birthday, but given the current outbreak, it's now available starting at 6 months old.

The Texas measles outbreak increased by four cases on Tuesday, including the first in the San Antonio area, according to health officials. The Texas Department of State Health Services has now reported 722 cases connected to the outbreak that is centered in the South Plains region.

The Texas measles outbreak has grown by only four cases since last week, marking another period of progress as health officials work to slow the spread of the virus.