For my family brother mother and father.

All they were covid positive Not vaccinated (not even first dose) Mom 55 ,was admitted on april 7 till april 13 cough fever symtoms (on bp medication) Father 60 and brother 28 was positive just because we done rtpcr else no symptoms at all.. Date of test 18 april for males and isolation followed till april end by all of three. Father took allopathy medicines  because he have sugar (levels 190 around and on insulin 2 times) brother prefered ayurvedic medicines. Questions : 1. I wanted to know what if they take vaccine next week before 3months period i mean ? 2. Father have sugar vaccine before 3 months will harm just because diabetic? 3. What if some one doesnt have enough antibodies ? I m willing to perform anti body test on them and if they are less then shall they take vaccine immediately? Please help me knowing it would be great ful Love and blessings to the doctor community ..Thank you for serving us 🙏