Safety and Immunogenicity of Aerosolised Ad5-nCoV or Intramuscular Ad5-nCoV or Inactivated COVID-19 Vaccine Coronavac Given as the Second Booster Following Three Doses of CoronaVac: A Multicentre, Open-Label, Phase 4, Randomized TrialRong Tang, Jingxin Li, Peng Wan et al.|SSRN Electronic Journal|2022Cited by 3