Nasal spray vaccines offer an innovative approach to immunization by delivering vaccine agents directly through the nasal passages. This method provides a needle-free, non-invasive alternative to traditional injections, improving accessibility and patient comfort. Understanding the implications and advancements in nasal spray vaccines sheds light on their potential role in global health. According to Marketintelo, “The global Nasal Spray Vaccine Market size was valued at approximately USD 1.8 billion in 2024 and is projected to reach USD 4.2 billion by 2032, growing at a compound annual growth rate (CAGR) of 11.2% during the forecast period 2024–2032.”