According to Wikipedia, "Interferons are a group of signaling proteins made and released by host cells in response to the presence of several viruses. In a typical scenario, a virus-infected cell will release interferons causing nearby cells to heighten their anti-viral defenses."
There is no guarantee you wont be scared what ive done to make friends with people is to become friends with them in my classes then slowly talk to them more till you can hang out during lunch period