Add Yahoo as a preferred source to see more of our stories on Google. March 2 (Reuters) - U. S. Centers for Disease Control and Prevention acting director Jay Bhattacharya on Monday said the MMR vaccine remains the most reliable and effective way to prevent the spread of measles.

Add Yahoo as a preferred source to see more of our stories on Google. I was always on track with both my children's childhood NHS vaccination schedules - that's until they reached their first birthdays.