Infectious Information 3/27/2026
Key Points:
- Antibiotics can disrupt the gut microbiome for 4 to 8 years, potentially affecting long-term health.
- The South Carolina measles outbreak has reached 997 cases, contributing to a US total of about 1,500 cases amid low vaccination rates in many low and middle-income countries.
- Avian flu continues to impact farms and wildlife, with over 350,000 birds culled in Indiana, marine mammal deaths in California, and Europe's first H9N2 case reported.
- The emerging Covid variant BA.3.2 is present in 23 countries and differs significantly from the vaccine-covered JN.1 lineage, though current infection indicators are declining.
- Hepatitis C remains under-treated, with fewer than one-third of patients receiving antiviral therapy, hindering efforts to reduce disease prevalence.