Researchers investigated whether COVID-19 might be linked to a higher risk of lung cancer, especially for people who smoke. They analyzed health records of over 166,000 current smokers, comparing those who had COVID-19 to a matched group who did not. They found that smokers with a history of COVID-19 had a higher risk of being diagnosed with lung cancer.
To understand why this link might exist, scientists conducted lab studies using genetically modified mice. They found that exposing the mice to the SARS-CoV-2 spike protein, a key part of the virus, could promote lung tumor growth. This effect appeared to depend on a specific protein in the body called thymidine phosphorylase (TYMP).
It is very important to be careful with these results. The human data only shows an association or link; it does not prove that COVID-19 causes lung cancer. Many other factors could explain the connection. The mouse studies are preclinical, meaning they are early lab research and the findings may not translate directly to humans.
Readers should understand this as early scientific exploration. The study suggests a potential long-term health concern worth further investigation, particularly for smokers. The identification of the TYMP protein points scientists toward a possible biological pathway to study in the future, but it is not a current treatment target.
