Some researchers also believe they may help suppress the immune system.

These drugs, which are already on the market, suppress the immune system.

They said the stress of living in a city could also suppress the immune system.

Suppressing the immune system doesn't just mean you're more likely to catch a cold.

Other medications that suppress the immune system are sometimes needed.

Right now, the only preventive approach is to suppress the entire immune system.

But many work by suppressing the whole immune system, rather than specific parts of it.

Thus, having medications to suppress the immune system was essential.

Be careful when using medications that suppress the immune system.

These receptors may also act to suppress the immune system under certain conditions.