Implementation of Covid 19 vaccine: Acceptance, Success and Challenges: Prospective observational design from tertiary referral hospital, Kerala, India. Asian Journal of Pharmaceutical and Health Sciences, [S. l.], v. 11, n. 4, p. 2584–2592, 2021. DOI: 10.5530/xm6gt192. Disponível em: https://ajphs.com/index.php/ajphs/article/view/160. Acesso em: 15 oct. 2025.