Too many vaccines added to the routine vaccination schidule which might require giving two months old child up to 4 injections even with the combined vaccine injection.
No upper limit has been established regarding the number of vaccines that can be administered in one visit. When giving several injections at a single visit, separate
2 intramuscular (IM) vaccines by at least 1 inch (2.5 cm) in the body
of the muscle to reduce the likelihood of local reactions overlapping.