I think the reverse operation of Brazilian tourists in COVID-19 is probably because some people in Brazil don't pay attention to some precautions in COVID-19, or even say that the basic knowledge is not popularized. This is why Brazilians are not particularly important to prevent COVID-19. They don't care about these little things in their lives. Only receiving tourists from COVID-19 must be caused by some viruses in their country, which makes some COVID-19 patients in Brazil increase sharply. For Brazil, this may be a devastating disaster. Therefore, when we face this matter, we should not treat it as a joke, but seriously study the reasons, why Brazil did it, and even how to protect the Brazilian people. Some of our tourists in Brazil should also pay attention to their own self-protection so that Brazil can prevent and control the epidemic.
To sum up, this is my view on this reverse operation in Brazil.