Scott Atlas was appointed as a special adviser in the coronavirus taskforce as he has a background in medical science and health care policy.
Atlas seems to downplay coronavirus. However, we cannot say Trump appointed him for that reason. Moreover, in interviews, Atlas clarified that he has been appointed as a special adviser in the task force since he is a health care policy adviser.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.