Hey,

B.SC Microbiology has its own scope in itself. If you did not make into IISERs, it does not mean that there is no other good colleges which offers exposure in this  are. IISER is definitely a good choice, but, you also need to not that, not all students that study in IISER get successful, and also, not all students that are not a part of IISER, are unsuccessful. It will all depend, how much knowledge, clarity you got in your subjects after studying the course. After B.SC Microbiology, you can get into many virology labs, agriculture, chemical and many more industrial area. They do not accept only IISER Students but candidates who have knowledge, confidence in their area are selected.

Know more about B.SC Microbiology course, its scope, career prospects over here: https://www.careers360.com/courses/bsc-in-microbiology