Has your child been vaccinated?

Matthew Mueller (right) leads youngsters in song as they chase bubbles at Toddle Tunes in Los Angeles. The business offers music enrichment for kids and has recently banned anyone who is not vaccinated, unless it is for medical reasons, from attending class. Some say it’s the first place they finally feel safe taking their kids after the measles outbreak. Photo: TNS

The fear of having a child contract a contagious childhood disease from unvaccinated children has grown in recent years, prompting some parents to rethink choices and activities that once seemed innocuous.

A mother in California formed a Facebook page where parents could arrange play dates for their children with other vaccinated youngsters.