Commuters walk up the redesigned subway stairs at the Tanjong Pagar subway station on August 23, 2011 in Singapore. The subway stairs have been repainted in bright colours and slogans encouraging people to take the stairs, by way of promoting fitness in the city. (Photo by Chris McGrath/Getty Images)

Young adults wearing a mask, attends a ceremony as they commemorates the Coming of Age Day of young people entering adulthood in Tokyo, Japan, on January 10, 2022. While the COVID-19 epidemic continues to progress in Japan due to the new Omicron variant, the events that have been organized by the various municipalities of Tokyo have followed a strict sanitary protocol, such as temperature control, disinfection of hands, and the wearing of a protective mask. (Photo by David Mareuil/Anadolu Agency via Getty Images)

Two cats watch a mouse walking on the pavement in Kuwait City on March 8,2017. (Photo by Yasser Al-Zayyat/AFP Photo)

Models dressed as bandaged nurses take part in a promotional event for the film “Silent Hill” on June 22, 2006 in Tokyo, Japan. (Photo by Junko Kimura/Getty Images)

In this photo illustration a package of Nicotine Gum, which is advertised as helping people stop smoking cigarettes, is seen on January 10, 2012 in Miami, Florida. A study published in the journal Tobacco Control on Monday, reported that the nicotine alternatives, like Nicotine Gum, have no lasting effect on people trying to quit their smoking habit. (Photo illustration by Joe Raedle/Getty Images)

Coffins are lined up near the wreckage of the bus, on July 29, 2013. (Photo by Salvatore Laporta/Associated Press)

Members of the American Civil War Society take part in a mock battle in the grounds of Cusworth Hall, South Yorkshire on July 2, 2011 in Doncaster, United Kingdom. Enthusiasts from all walks of life are taking part in re-enacting scenes from the American Civil War and in 'living history' events which are as authentic as possible. (Photo by Christopher Furlong/Getty Images)