Resiquimod is a special cream that helps boost the immune system by making the body produce more immune signals like interferon and cytokines.
In a study with 41 healthy people, different doses of the cream were applied to their skin to see how well they worked and if they caused any side effects.
The results showed that the lower doses were safe and increased immune responses in the skin, while the higher dose had more side effects and wasn't as well tolerated.