When you ask scientists, “What’s your fear for the Big One, the pandemic that’s going to kill us all?” — not that there is a pandemic that’s going to kill us all — but if you ask them that, they say, “Flu.” They worry about some new flu, bird flu or swine flu, that’s highly lethal but becomes very transmissible between humans. I know only one or two scientists who have said, “You know, I also worry about coronaviruses being the Big One.”

I don’t want to raise alarm that this is the Big One. But this is a new, scary and confusing one, and we don’t yet know how far it’s going to spread and how many people it’s going to kill.

What do you think about the public’s reaction to your reporting?

I’m always trying to figure out: Am I being alarmist, or am I not being alarmist enough? I was too alarmist about H5N1 back in 2005, the bird flu. I was not alarmist enough about West Africa and Ebola in its early days. All previous Ebola outbreaks had killed a few hundred people. That one killed 11,000.

A big part of my beat is debunking the panicky stories. It actually consumes almost as much of my time as reporting does.

I try to spread truth instead of panic, even if it takes me a little longer to get it right.

That’s it for this briefing. See you next time. — Chris

Thank you

Mark Josephson and Kathleen Massara provided the break from the news. Alex Traub wrote today’s Back Story. You can reach the team at briefing@nytimes.com.

P.S.

• We’re listening to “The Daily.” Today’s episode is about the post-impeachment President Trump.

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