Can the chicken pox and pneumonia vaccines be administered simultaneously?

Delaying the administration of pediatric hepatitis B vaccines may affect their effectiveness

A 5-month-old baby experienced red saliva after receiving the polio vaccine, prompting concerns from the parents about antibody levels and whether they should receive the pentavalent vaccine 37 days later.

If an infant misses the timely BCG vaccination, is it necessary to undergo a tuberculin test before vaccination?