Here's a link for a case study on an oil rig. However, the illness was thought to be fungi-related, not viruses. [1] https://www.germxit.com/wp-content/uploads

Here's a link for a case study on an oil rig. However, the illness was thought to be fungi-related, not viruses. [1] https://www.germxit.com/wp-content/uploads/2015/06/CSOilRigCostalEnergy.pdf https://www.germxit.com/wp-content/uploads/2015/06/CSOilRigC...