Childhood Vaccines Hit Record Lows as Exemptions Soar, Measles Threatens Comeback

U.S. kindergarten vaccination rates have slipped to 92.4% for MMR and 92.0% for DTaP, falling further below the 95% threshold needed for herd immunity. The CDC's Monday data release shows this marks the fourth consecutive year of declining coverage—a trend that has experts sounding alarms about the nation's shrinking immunity buffer.

• 280,000 kindergartners lack documentation of completing the two-dose MMR series
• 4.2% of children now have vaccine...