Thank you so much, Fallon said while reaching into his desk drawer and pulling out the mask.

It is great to have you here.

Clinton laughed and high-fived the late-night host, who then made a show of applying hand sanitizer.

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Credit: Andrew Lipovsky/NBC

But also people kind of want to see this Hillary, which is the badass Hillary.

They want to see someone whos going to protect us and be strong and tough.

Its especially tricky for women, Clinton said.

She added, You dont talk about ISIS with a big grin on your face.

… Its a constant balancing act.

Watch Fallon and Clinton below.