June's Most-Read Infectious Disease Stories

The latest CDC numbers show a 5.0% increase of measles cases from week-to-week. The US total reached 4080 confirmed cases, 78% above all of 2025.

With US measles cases nearing 3,900 this year and Pennsylvania reporting its fifth measles-related death, here is a review of how the virus spreads, how it is prevented and managed, and what severe disease looks like.

Vaxcyte's 31-valent pneumococcal conjugate vaccine candidate met every prespecified primary immunogenicity and safety endpoint against PCV20 and PCV21 in the OPUS-1 trial of 4,047 US adults.

A new study in infants challenges the long-standing belief about the pathogen’s effects in the youngest pediatric population. Senior author Joseph Zackular, PhD, provides insights around his work including how it reshapes gut development and offers potential intervention strategies to shield neonates.

The 18-year old resident of the state suffered from acute disseminated encephalomyelitis. Pennsylvania numbers are surging with some of the highest state totals of measles cases in the country.

Irkutsk anti-plague institute death prompts quarantines and conflicting official accounts.

A laboratory technician at a Siberian anti-plague institute has died of pneumonia of unknown cause, prompting quarantines and contact monitoring while Russian officials stop short of confirming plague.

A study finding clesrovimab comparable to palivizumab in protecting at-risk infants in their first RSV season was extended to demonstrate clesrovimab effective and well-tolerated when administered in their second season.