Published: 8 September 2021
Author(s): Chia-Chao Wu, Kuo-Cheng Lu
Section: Letter to the editor

Vaccines are a critical tool in the battle against COVID-19. An amazing article regarding the effects of 2 inactivated SARS-CoV-2 vaccines in symptomatic COVID-19 patients, and stated that the vaccine efficacy was around 72∼78% in the United Arab Emirates and Bahrain [1]. The efficacy of the BNT162b2 and mRNA-1273 vaccine reached 94∼95%, which was performed primarily in the United States. Although inactivated whole-virus vaccines may induce more types of antiviral antibodies than mRNA vaccines, the level of neutralizing antibodies was lower, resulting in a comparatively lower protective effect.

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