A cleaning staff waers protective gear to disinfect a metro carriage as a prevemtive measure against the spreading of the COVID-19 coronavirus in Addis Ababa, Ethiopia, on March 20, 2020. African countries have been among the last to be hit by the global COVID-19 coronavirus epidemic but as cases rise, many nations are now taking strict measures to block the deadly illness. (Photo by Michael Tewelde/AFP Photo)

Students of Kiev's Olympic College perform during a rally in front of the Parliament building in Kiev, Ukraine, 15 September 2020. Students were protesting against the reorganization of the college, at risk of being closed, and the land where it rises which could end up for sale along with the facility's stadium. (Photo by Sergey Dolzhenko/EPA/EFE)

Revellers in Leeds, United Kingdom were excited to be out and about again on July 18, 2021. At a minute past midnight, England dropped most of its remaining Covid-19 social restrictions, such as those requiring indoor mask-wearing and limits on group gatherings. These changes come despite rising infections, pitting the country's vaccination programme against the virus's more contagious Delta variant. (Photo by Ioannis Alexopoulos/PA Wire Press Association via Getty Images)

Police detain a woman during a protest against Prime Minister Benjamin Netanyahu and his government's handling of the coronavirus disease (COVID-19) crisis, near Netanyahu's residence in Jerusalem on July 24, 2020. Reimposed coronavirus curbs after a rise in new COVID-19 cases have prompted Israelis demanding better state aid to take to the streets in almost daily demonstrations. Public anger has also been fueled by corruption alleged against Netanyahu, who went on trial in May for bribery, fraud and breach of trust – charges he denies. (Photo by Ammar Awad/Reuters)

A worker carries a tray of boiled tofu in a traditional tofu factory in Depok, Indonesia, 21 January 2015. Tofu has been a common side dish for many Indonesian families. It is healthy, inexpensive and easy to find throughout the city. Tofu entrepreneurs in Indonesia are suffering due to the weakening of the rupiah against the US dollar and the rise in prices of imported soybeans in the international market, forcing tofu-makers to cut their production and lay off staff. (Photo by Adi Weda/EPA)

These images show off some of the world's most majestic creatures silhouetted against the beautiful rising and setting sun. The vibrant pictures feature a variety of animals in the wild and were taken by a host of photographers at locations around the world. The striking images all have one thing in common: the photographers' awe-inspiring ability to perfectly capture the silhouettes of earth's beautiful creatures. Here: a blue wildebeest moves through grassland at dawn with the sun in the background in Mara Naboisho Conservancy, Kenya, Africa. (Photo by Renato Granieri/Caters News/Ardea)

Castle rising in the mist on April 14, 2022. Castle Rising is a ruined medieval fortification in the village of Castle Rising, Norfolk, England. It was built soon after 1138 by William d'Aubigny II, who had risen through the ranks of the Anglo-Norman nobility to become the Earl of Arundel. (Photo by Terry Harris/The Times)

Pedestrians cover their face as they walk along the dusty road in Kathmandu, Nepal February 27, 2017. Nepal has forced 2,500 old vehicles off roads in its capital city of Kathmandu, part of a fight against alarming air pollution levels that have hit nine times World Health Organisation (WHO) limits. Air pollution has been a chronic problem in rapidly growing Kathmandu, which sits in a Himalayan valley and is home to more than 3mn people. (Photo by Navesh Chitrakar/Reuters)