I am really thankful to all of my students who had been a real source of inspiration for me to write down the most demanded book of its kind in Microbiology by the subject experts with the name of Complete Review of Microbiology and Immunology. The book is a collection of my PG notes and vast experience of MCQ based teaching methods. Hence with my experience of teaching for the last 5 years I had tried my best to fulfil the demands and request of the students from all over India to write a conceptual based book to cover the pattern of each and every exam the student is going to give. Microbiology always carry a major chunk of questions in every exam, so I hope this new edition of my book will serve you the best, most simplified and fruitful approach. A section of images based on recent trends incorporated, which will help you to tackle all sorts of recent Image-based Questions asked in recent past in most of the exams. We must admit that despite our best efforts, some errors might have crept in inadvertently regarding factual information or typographical mistakes. You are all requested to send these errors and send your valuable suggestions for improvement of the book, your suggestions, appreciation and criticism are most welcome. You can follow my Facebook “PG Microbiology made easy by Dr. Panwar” for recent updates and discussion.