Pennsylvania’s measles outbreak continues to expand, with state officials reporting 55 new confirmed cases since Wednesday. The Pennsylvania Department of Health says the total number of confirmed measles cases reaches 890 for the year.

According to the state’s update, the outbreak affects 39 counties. Outlets also report that the outbreak has led to significant health impacts, including 173 hospitalizations and four measles-associated deaths. The Guardian adds that fewer than 1% of those infected had been vaccinated, describing this as a key factor in the outbreak’s spread.

Across the sources, the common focus is the state’s latest case count and geographic spread, alongside ongoing containment efforts. Coverage differs mainly in the amount of detail included, with ABCNews.com highlighting the new cases figure and The Guardian adding hospitalization, death, and vaccination-rate context.