Verifying Infectious Disease Data

The latest CDC numbers show a 5.0% increase of measles cases from week-to-week. The US total reached 4,080 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.

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.

In the phase 3 LIBERTY study, the investigational monoclonal antibody, VYD2311, had significantly fewer adverse events than an mRNA COVID-19 vaccine, and it did not blunt vaccine-induced neutralizing titers when the two were given together.

Reported cases of Legionnaires’ disease have been on the rise for the past decade, and identifying Legionella bacteria requires specialized testing in the microbiology lab. Here is a clinical overview of Legionella bacteria, including required testing, treatment, and reporting to public health officials.