PITTSBURGH — Allegheny County health officials have reported its second case of measles in the last month.

It's unclear whether the two cases are related, but the Health Department is encouraging people to call their primary care physician if they experience symptoms such as a runny nose or cough and a high fever.

Officials have notified the infected person's workplace and have identified three other places where people may have been exposed: an office building in Monroeville on May 16; the Berry Quool yogurt store in Oakmont on May 17; and the Citizen's Bank Building downtown on May 19 or 20.

Most people aren't at risk because they've been vaccinated, but some groups are more susceptible, including people who haven't been vaccinated, those born after 1957 and those with compromised immune systems.

Measles is caused by a highly contagious virus, and symptoms begin 7 to 21 days after exposure.

The first measles case in the county was reported early this month in the Pittsburgh area.

Nationally, about 189 people had measles last year, according to the Centers for Disease Control and Prevention.

DUQUESNE — Authorities say a pregnant teenager lost her baby after she was shot four times at the front door of her Pittsburgh-area home.Police in Allegheny County said the 15-year-old girl was shot when she opened the door of the Duquesne residence early Monday.Relatives said the victim was recovering at a hospital, but they and police said the seven-month-old unborn child did not survive.Family members said they do not know anyone who would try to hurt the teenager.Allegheny County investigators are asking anyone with information about the case to call them.

CLEARFIELD — Bigfoot enthusiasts converged on a northern Pennsylvania town to swap theories about the creatures.About 50 Bigfoot enthusiasts met Saturday in Clearfield, and they fell into one of three camps. The town is about 120 miles northwest of Harrisburg.The first group believes that Bigfoot is a “cryptozoological hominid creature.” The second group thinks Bigfoot is an extraterrestrial with ties to UFOs or other aliens. The third group believes the Bigfoot types envisioned by the other groups are two different creatures.Eric Altman, director of the Pennsylvania Bigfoot Society, traces the legend of the creatures back to pre-Colonial Native Americans and newspaper accounts of “wildmen” as far back as 1838. But he says the term Bigfoot wasn’t used before 1958.