Is it obligatory for a girl or her family to inform her suitor that she had rheumatic fever in her childhood and uses preventive injections, even though she has recovered and the doctor stated that her health is sound?

The girl and her family are not obligated to inform the suitor about the medication she is taking, as this is not a defect that must be disclosed. The defects that must be disclosed are those that prevent sexual intercourse, or repulsive diseases like leprosy and elephantiasis.