Doctors and nurses typically work in very high radiation environments and I would not expect them to have robust immune systems.

The human immune system is tied into the seasons.

COVID-19 is dividing the population into those with robust immune systems and those that have immune dysfunction.

At the age of 49, it had emerged that I had immune system dysfunction that was arising out of hormone damage from working in high altitude astronomy.

Doctors and nurses are among the most irradiated professions.