leanna wen. sanjay, i want to start with you here. there is a risk to the president himself, to the 73-year-old man who is obese, and there is a risk to the health of america as well for this statement that he was so proud about making. i want you to weigh in on whichever one you think might be more important. >> i think the potential concern for america is a significant one. this is a medication that has not been proven to work as either a prophylaxis, a preventative, or a treatment. number one. because those are two different things. it has been shown to cause harm in people who are taking it as a treatment. i mean, you know, this is the -- the studies that came out initially, anecdotal, wasn't clear, they were followed up, even in france, even in brazil, here in the united states, showing no benefit in people who were already ill with covid and possible harm, causing fatal cardiac arrhythmias, heart arrhythmias. as far as prophylaxis goes, you take it try to prevent the infection, maybe become exposed, not get the infection after a