A Tunisair aircraft prepares for landing at the Brussels Airport in Zaventem, Belgium, Nov. 30, 2021. Omicron, a new COVID-19 variant, has been detected in a growing number of countries and regions worldwide, prompting governments to tighten their restrictions and impose new travel bans. (Xinhua/Zheng Huansong)
A Swiss aircraft prepares for landing at the Brussels Airport in Zaventem, Belgium, Nov. 30, 2021. Omicron, a new COVID-19 variant, has been detected in a growing number of countries and regions worldwide, prompting governments to tighten their restrictions and impose new travel bans. (Xinhua/Zheng Huansong)
A Tunisair aircraft prepares for landing at the Brussels Airport in Zaventem, Belgium, Nov. 30, 2021. Omicron, a new COVID-19 variant, has been detected in a growing number of countries and regions worldwide, prompting governments to tighten their restrictions and impose new travel bans. (Xinhua/Zheng Huansong)
A woman passes a bus for vaccination in Brussels, Belgium, Nov. 30, 2021. Omicron, a new COVID-19 variant, has been detected in a growing number of countries and regions worldwide, prompting governments to tighten their restrictions and impose new travel bans. (Xinhua/Zheng Huansong)
A woman passes a bus for vaccination in Brussels, Belgium, Nov. 30, 2021. Omicron, a new COVID-19 variant, has been detected in a growing number of countries and regions worldwide, prompting governments to tighten their restrictions and impose new travel bans. (Xinhua/Zheng Huansong)
A pedestrian passes the lighting for Christmas in Brussels, Belgium, Nov. 30, 2021. Omicron, a new COVID-19 variant, has been detected in a growing number of countries and regions worldwide, prompting governments to tighten their restrictions and impose new travel bans. (Xinhua/Zheng Huansong)
A bus for vaccination is seen in Brussels, Belgium, Nov. 30, 2021. Omicron, a new COVID-19 variant, has been detected in a growing number of countries and regions worldwide, prompting governments to tighten their restrictions and impose new travel bans. (Xinhua/Zheng Huansong)
A Brussels Airlines aircraft prepares for landing at the Brussels Airport in Zaventem, Belgium, Nov. 30, 2021. Omicron, a new COVID-19 variant, has been detected in a growing number of countries and regions worldwide, prompting governments to tighten their restrictions and impose new travel bans. (Xinhua/Zheng Huansong)
