Doctors and manufacturers of household cleaners have issued statements in response to comments President Trump made in a briefing on Thursday, during which he suggested that injection of disinfectants could be used to fight the coronavirus.Following a presentation by the acting Undersecretary of Homeland Security for Science and Technology, William Bryan — during which Bryan noted that isopropyl alcohol (the active ingredient in most hand sanitizers) and bleach (commonly used in many disinfectant products) kill the virus — Trump took the podium to offer his thoughts.«And then I see the disinfectant, where it knocks it out in a minute.