Low tetanus-diphtheria-acellular pertussis (Tdap) vaccine coverage among healthcare workers in a quaternary university hospital in Sao Paulo, Brazil: need for continuous surveillance and implementation of active strategies - Randi, Bruno Azevedo; Miyaji, Karina Takesaki; Lara, Amanda Nazareth; Ibrahim, Karim Yaqub; Infante, Vanessa; Rodrigues, Camila Cristina Martines; Lopes, Marta Heloísa; Sartori, Ana Marli Christovam (Brazilian journal of infectious diseases, 2019)