The co-occurrence of the COVID-19 pandemic and record-breaking wildfire seasons has created a unique public health crisis. While both individually stress the respiratory system, emerging evidence suggests they act as a "double whammy," where wildfire smoke significantly exacerbates COVID-19 transmission, severity, and mortality. In 2020, extreme wildfire events in the Western United States were linked to an estimated 19,700 additional COVID-19 cases and 750 deaths.

uses to enter human lung cells. This increases the physiological "surface area" for viral infection. PM2.5cap P cap M sub 2.5

Exposure to fine particulate matter ( PM2.5cap P cap M sub 2.5

particles penetrate deep into the lungs, triggering a localized inflammatory response. This distracts the immune system, potentially weakening its ability to mount an effective defense against

Both smoke and the virus trigger oxidative stress and cytokine release. In combination, these can lead to "cytokine storms," increasing the risk of Acute Respiratory Distress Syndrome (ARDS). 3. Epidemiological Evidence West coast wildfires, COVID a double whammy to lung health

) from wildfire smoke has been shown to upregulate the expression of Angiotensin-Converting Enzyme 2 (ACE2), the primary receptor that

1. Introduction