While the legal requirement (mandate) for these vaccines depends on your local country or state regulations, both the rotavirus and pneumococcal conjugate (PCV) vaccines are highly recommended and considered essential by pediatric experts worldwide. These vaccines are crucial for protecting your 3-month-old baby from severe infections, such as rotavirus-induced diarrhea and pneumococcal diseases like pneumonia and meningitis. They are safe, highly effective, and designed to build early immunity when babies are most vulnerable. I strongly encourage you to consult your pediatrician to help you follow the recommended immunization schedule for your baby's protection.