“Tonight Show” host Jimmy Fallon greeted U.S. presidential candidate Hillary Clinton at an interview wearing a medical mask.

Clinton appreciated the joke and gave the late-night host a high five, Fallon then pulled out some hand-sanitizer to cleanse his hand, Daily Mail reported.

Earlier, Clinton’s physician, Dr. Lisa Bardack informed that she received medical treatment for pneumonia.

Special attention to the health of the candidate of Democratic Party was drawn after the incident, which occurred during one of the memorial events devoted to victims of the tragedy of September 11, 2001.  According to her campaign, she overheated and her organism was dehydrated.

Republicans candidate Donald Trump was also the guest of Jimmy Fallon who messed Trump’s hair to check their naturalness during the show. Previously, Internet users suggested that Trump wears a wig.