Cigarette Smoke Identified as Potential Superspreading Agent for COVID-19, Measles, and Influenza Viruses

Strategic Insights -

Research conducted at Pusan National University in South Korea suggests that cigarette smoke particles may play a significant role in the transmission of COVID-19, measles, and influenza viruses. According to the study, cigarette smoke can act as a superspreading agent by facilitating the detachment, suspension, and long-range transport of respiratory viruses. The research team proposed empirical and computational models to simulate puffing-induced airflow, particle-microdroplet interactions, and viral aerosol transport.

Key Takeaways:

  • Cigarette smoke particles (CSPs) may induce mechanical shearing of virus-enriched mucosal droplets, enhancing aerosolization and suspension of viral particles.
  • CSPs may bind to mucosal droplets during the aerosolization process via hygroscopic, van der Waals, and electrostatic forces, forming hybrid aerosols with prolonged airborne residence.
  • The study suggests that enclosed smoking spaces may pose heightened transmission risks, warranting updated infection and control guidelines.
  • The research proposes empirical and computational models to simulate puffing-induced airflow, particle-microdroplet interactions, and viral aerosol transport.
  • The findings could necessitate updated transmission models and stricter control policies if validated.
  • Pusan National University's School of Dentistry is involved in the research, with Dr. Donghyun Kim as the contact person for additional information.
  • The study was published in Medical Hypotheses, a peer-reviewed journal.

Statistics:

  • Indoor concentrations of cigarette smoke particles reached 631-1,458 μg/m3.
  • The researchers proposed a superspreading vector of airborne viruses, exceeding the 2 m social distancing control.
  • The study suggests that enclosed smoking spaces may pose a heightened transmission risk.

Sources:

  • "Cigarette Smoke As a Superspreading Vector of Sars-cov-2, Measles Virus, and Influenza Virus: a Hypothesis On Virus-laden Aerosol Formation and Transport." Medical Hypotheses, 2025;203.
  • Medical Letter on the CDC & FDA. October 19, 2025; p 410.
  • NewsRx. Studies Conducted at Pusan National University on COVID-19 Recently Reported (Cigarette Smoke As a Superspreading Vector of Sars-cov-2, Measles Virus, and Influenza Virus: a Hypothesis On Virus-laden Aerosol Formation and Transport).