The iconic London Eye is turning blue to show appreciation and gratitude toward NHS (Photo: REUTERS)

The arch at Wembley Stadium, London is pictured lit blue. The stadium has promised to repeat the tribute every evening during the outbreak (Photo: PA Media)

Blue as Lincoln Cathedral's thank-you color (Photo: PA Media)

Belfast City Hall is lit up in blue (Photo: Getty Images)

The metal sculpture of horse heads, Kelpies in Falkirk turns blue (Photo: PA Media)

Scott LoBaido, 55, from Staten Island posts a large "Thank You" note dedicated to the health workers of the nearby Elmhurst Hospital Center who are treating and testing people for COVID-19 in Queens, New York City, March 27, 2020. (Photo: REUTERS)

"Thank you key workers", a little girl write on the wall to thank key workers who are fighting against the novel virus round the clock (Photo: REUTERS)

A boarded-up business thanking those still working amid the coronavirus outbreak in Seattle, Washington, March 24 (Photo: REUTERS)

A thankyou sign outside a pub at Broxbourne, Britain, March 31 as the novel virus is ravaging the country (Photo: REUTERS)

Words expressing thanks are projected on a building in Sao Paulo, Brazil, on March 26 (Photo: REUTERS)

Nearly 200 dinners sets are sent to medial staff at Clinic hospital free of charge as a gesture of thanks from the City's Takeaway Businesses, in Barcelona, Spain, March 26, 2020. (Photo: REUTERS)

Health workers from Clinic hospital applaud citizens who show them gratitude from their balconies and windows, during the coronavirus disease outbreak, in Barcelona, Spain March 24 (Photo: REUTERS)

People clap and bang utensils from their balconies to cheer for COVID-19 frontline fighters (Photo: REUTERS)

A woman and her kids are encouraging COVID-19 fighters from balconies (Photo: REUTERS)

People are all smile as they're cheering for emergency personnel and sanitation workers (Photo: REUTERS)