Rock County health officials reported five probable measles cases on Tuesday, Oct. 13, saying all five were within one family and no cases outside the family had been identified as of Tuesday afternoon. The cases are not linked to the measles outbreak in southwestern Wisconsin, according to Rock County Public Health. Wisconsin had recorded 263 measles cases so far this year, many tied to Iowa, Grant and Lafayette counties. Measles spreads through the air when an infected person coughs or sneezes. The virus can remain in the air or on surfaces for up to two hours after the person has left. Symptoms can include a high fever, cough, runny nose, small white spots inside the mouth and a rash. The county health department recommends vaccination as the best protection. Children are advised to receive two doses of the measles, mumps and rubella (MMR) vaccine: the first at 12 to 15 months and the second at ages 4 to 6.