Assessment - 1 yr old

Bought my girl for her jab for hap B last saturday. She's such a good girl. Tot she will try cry loudly when taking jab but surprising she's strong. No sound from her at all (maybe she's busy eating her biscuit). Everythings seems to be good except she's slightly under-weight. Dr says she tall (80cm) but her weight only 8.45kg (ideal weight is ard 9.5kg). 3 months later will be bringing her to take her jab again :(