Hello dear, Thank you for your contact to health care magic. I read and understand your concern. I am Dr Arun Tank answering your concern. No it is wrong belief. Once the active infection is gone IgM will gradually disappears. As your daughter is having IgM band again than you are having the infection again. Typhoid is notorious for its recurrences. I advice you to take the blood and stool culture for the Salmonella typhi. Taking the drugs according to the report will cure you and also prevent recurrence. Please eat small and frequent diet of high protein and carbohydrate. Please avoid spicy and high fat diet. This can cause perforation in the intestine making the condition worse. Please maintain good hand hygiene as it can prevent infection to other people. I will be happy to answer your further concern on bit.ly/DrArun. Thank you, Dr Arun Tank Infectious diseases specialist, HCM.