This study investigated how exposure to air pollution particles, specifically fine PM2.5 and coarse PM10, affects SARS-CoV-2 infection in human lung cells.

Key Findings:

• PM10 Increases Infection: Pre-exposure to coarser pollution (PM10), but not fine pollution (PM2.5), significantly worsened infection by the Delta variant. It increased infected lung cells by 13.7 percent and boosted viral levels by 2.6 fold.
• Weakened Antiviral Defenses: This increase did not happen because the virus entered cells more easily. Instead, PM10 crippled the cells natural defenses by suppressing cell death (apoptosis) and lowering protective inflammatory immune signals.

The Takeaway

PM10 air pollution silences the lungs viral alarms, creating an unprotected environment that allows the virus to multiply rapidly.

Read more: https://pmc.ncbi.nlm.nih.gov/articles/PMC12849096/

First Author: Supasek Kongsomros

Corresponding Authors: Supasek Kongsomros and Arunee Thitithanyanont