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Are there more blastomycosis cases now compared to before the pandemic?

moderate confidence  ·  Last reviewed May 22, 2026

Reports from 2019 and during the COVID-19 pandemic indicate that the number of blastomycosis cases remained relatively stable. There is no clear evidence of a major surge in infections compared to the years before the pandemic.

What the research says

A surveillance report from 2019 documented cases of blastomycosis across the United States, establishing a baseline for infection rates before the pandemic began 1.

During the COVID-19 pandemic, another report examined trends in fungal infections, including blastomycosis, and found that case numbers did not show a significant increase compared to pre-pandemic data 3.

While specific outbreaks have occurred, such as one among workers at a Michigan paper mill, these are localized events and do not represent a nationwide rise in total cases 2.

What to ask your doctor

  • How do the symptoms of blastomycosis differ from other common respiratory infections?
  • What are the standard treatment options if I suspect I have blastomycosis?
  • Are there specific environmental exposures in my area that increase my risk for this infection?
  • What signs should I watch for that indicate my infection is getting worse?

This question is drawn from common patient questions about Infectious Disease and answered using cited medical research. We do not provide individualized advice.