Does TB Vaccination Reduce COVID-19 Infection?: No Evidence from a Regression Discontinuity Analysis

Masao Fukui; Kohei Kawaguchi; Hiroaki Matsuura

Figure 1 displays the results of the regression discontinuity analysis for Colombia, the Czech Republic, Thailand, Vietnam, and Singapore. The figures from Vietnam and Singapore indicate that the immunization rate quickly increased after the vaccination policy. Thus, the discontinuity of treatment at the policy changes seems to be justified. In (a) Colombia, there is no significant decrease after coverage (74 years old at the end of 2019), the start of vaccination policy (59 years old): nor is there a significant increase after the change of strains (41 years old). In (b) the Czech Republic, there is no significant decrease after coverage (84 years old), the start of vaccination policy (66 years old), the change to the Japan strain (38 years old): nor is there a significant increase after the change from the Japan strain (25 years old), and the termination of the vaccination policy (10 years old). In (c) Thailand, there is no decrease after the start of vaccination policy (42 years old) or after the change from Danish to Japan strain (32 years old). In (d) Vietnam, there is no significant drop after coverage and start of vac-4 All rights reserved. No reuse allowed without permission.