<s>[INST] One month old baby girl, got a breast infection, had to have surgery as it was very swollen and infected, now is under anti-biotics and got vaginal thrush! I am most worried for all this on such a small baby. [/INST] Hi, It could be because of poor hand hygiene while handling the baby which is the most common cause for such a scenario in this age group. The only other possibility is a primary immunodeficiency like severe combined immunodeficiency. I suggest you discuss all this with her pediatrician. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Sumanth Amperayani, Pediatrician, Pulmonology </s>