Keep calm and carry on

Unlike some foreign leaders and Trump officials whose secrecy and mixed messages about the virus known as COVID-19 have arguably worsened an outbreak that’s infected roughly 90,000 and killed more than 3,000 people across the globe, New York’s politicos and health officials have been prepping residents for the virus’ likely arrival for weeks.

Which leaves us unsurprised at news of the city’s first confirmed case, involving a 39-year-old Manhattan health-care worker recently returned from Iran.

When she started experiencing symptoms — upper respiratory troubles and fever — she did exactly the right thing. She contacted her doctor, then “self-quarantined” in her apartment. Others in the nation’s most densely packed and international metropolis should follow that lead.

Feeling fine? Continue your daily routine: use mass transit, go shopping, go to work.

Wash your hands frequently, with soap, for at least 20 seconds, or use alcohol-based hand sanitizer. The virus spreads through droplets and on surfaces, like the common cold or flu.

If you have a fever, cough or shortness of breath, and recently traveled to a hotspot like China, South Korea, Japan, Italy or Iran, or interacted with someone who did, see a physician pronto. Get tested.

If you didn’t travel to any of those countries but still have similar, flu-like symptoms, stay home and call your doctor. CDC researchers say symptoms are likely to manifest two to 14 days after someone’s exposed.

Don’t stockpile facemasks, which aren’t helpful to protect the uninfected. You’re taking them away from health-care workers who need them.

Above all, don’t panic.