The Brief Montgomery County health officials have confirmed four measles cases involving people within the same family. Health officials advise anyone showing symptoms to isolate and call their healthcare provider before visiting a clinic to avoid spreading the virus. Health officials in Montgomery County are warning residents to stay safe after confirming multiple cases of measles within the area. What we know:The Montgomery County Public Health Department confirmed four residents in the same family have tested positive for measles. According to the public health department, measles is highly contagious and spreads through the air when an infected person coughs or sneezes.