coronavirus pandemic in more ways than one, treating patients but also volunteering to test some of the most promising experimental vaccines.Brazil is the country with the second-highest number of infections and deaths in the pandemic, after the United States, and the virus is still spreading quickly here.That is bad news in every way but one: it makes the South American country an ideal testing ground for potential vaccines against the virus.The job of guinea pig falls to medical staff who work in facilities treating patients infected by the virus, because they are the most likely to come into contact with it, enabling researchers to run a controlled experiment to see how well it works."I want to contribute, and this is my contribution --.