A pandemic prevention worker in a protective suit stands outside an apartment compound that was placed under lockdown as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

A pandemic prevention worker in a protective suit stands behind a pile of garbage bags outside an apartment compound that was placed under lockdown as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

Pandemic prevention workers in protective suits prepare to enter an apartment compound that was placed under lockdown as the outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

A delivery driver hands food to a resident of an apartment compound that was placed under lockdown as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

A man gets a swab tests at a temporary testing station as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China November 14, 2022. REUTERS/Thomas Peter 

A pandemic prevention worker in a protective suit sits at a temporary testing station as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China November 14, 2022. REUTERS/Thomas Peter 

People line up to get swab tests at a testing booth as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China November 14, 2022. REUTERS/Thomas Peter 

Pandemic prevention workers in protective suits prepare to enter an apartment compound that was placed under lockdown as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

A pandemic prevention worker in a protective suits keeps watch on people lining up to get swab tests at a testing booth as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China November 14, 2022. REUTERS/Thomas Peter 

A pandemic prevention worker in a protective suit stands outside an apartment compound that was placed under lockdown as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

A man gets a swab tests at a temporary testing station as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China November 14, 2022. REUTERS/Thomas Peter 

A pandemic prevention worker in a protective suit rests in the sun outside an apartment compound that was placed under lockdown as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

A pandemic prevention worker in a protective suit stands outside an apartment compound that was placed under lockdown as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

A pandemic prevention worker in a protective suit cycles near an apartment compound that was placed under lockdown as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

A pandemic prevention worker in a protective suit stands outside an apartment compound that was placed under lockdown as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

Pandemic prevention workers in protective suits ride an electric vehicle near an apartment compound that was placed under lockdown as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China, November 12, 2022. REUTERS/Thomas Peter 

A medical worker in a protective suit collects a swab from a man for nucleic acid testing, following the coronavirus disease (COVID-19) outbreak in Shanghai, China, November 18, 2022. REUTERS/Aly Song 

A pandemic prevention worker in a protective suit transports rubbish bins from a locked-down residential compound as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China November 18, 2022. REUTERS/Thomas Peter 

A woman gets a swab test at a temporary testing station inside a residential compound as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China November 18, 2022. REUTERS/Thomas Peter 

Pandemic prevention workers in protective suits walk outside a locked-down residential compound as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China November 18, 2022. REUTERS/Thomas Peter 

A woman gets tested for the coronavirus disease (COVID-19) at a nucleic acid testing site, following the outbreak in Shanghai, China, November 18, 2022. REUTERS/Aly Song 

Pandemic prevention workers in protective suits collect trash in a locked-down residential compound as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China November 18, 2022. REUTERS/Thomas Peter 

A woman gets tested for the coronavirus disease (COVID-19) at a nucleic acid testing site, following the coronavirus disease (COVID-19) outbreak in Shanghai, China, November 15, 2022. REUTERS/Aly Song 

Pandemic prevention workers in protective suits walk outside a locked-down residential compound as outbreaks of the coronavirus disease (COVID-19) continue in Beijing, China November 18, 2022. REUTERS/Thomas Peter 

People line up to take a nucleic acid test for the coronavirus disease (COVID-19) at a testing booth near an office building in Central Business District (CBD) in Chaoyang district, Beijing, China November 15, 2022. REUTERS/Tingshu Wang 

A man has his swab sample taken during nucleic acid test for the coronavirus disease (COVID-19) at a testing booth near an office building in Central Business District (CBD) in Chaoyang district, Beijing, China November 15, 2022. REUTERS/Tingshu Wang 

A bride gets tested for the coronavirus disease (COVID-19) at a nucleic acid testing site, following the coronavirus disease (COVID-19) outbreak in Shanghai, China, November 15, 2022. REUTERS/Aly Song 

People line up to take a nucleic acid test for the coronavirus disease (COVID-19) at a testing booth near an office building in Central Business District (CBD) in Chaoyang district, Beijing, China November 15, 2022. REUTERS/Tingshu Wang 

A worker in a protective suit guides people to scan health QR code at a nucleic acid test booth for the coronavirus disease (COVID-19), in Beijing, China November 11, 2022. REUTERS/Tingshu Wang 

People wearing protective masks cross a street, following the coronavirus disease (COVID-19) outbreak in Shanghai, China, November 15, 2022. REUTERS/Aly Song 

A worker in a protective suit guides people to scan health QR code at a nucleic acid test booth for the coronavirus disease (COVID-19), in Beijing, China November 11, 2022. REUTERS/Tingshu Wang 

A man has his swab sample taken for nucleic acid test for the coronavirus disease (COVID-19) at a testing booth, in Beijing, China November 11, 2022. REUTERS/Tingshu Wang 

A worker in a protective suit guides people to take a nucleic acid test for the coronavirus disease (COVID-19) at a testing booth near an office building in Central Business District (CBD) in Chaoyang district, Beijing, China November 15, 2022. REUTERS/Tingshu Wang 

People line up to take nucleic acid test for the coronavirus disease (COVID-19), at a testing booth in Beijing, China November 11, 2022. REUTERS/Tingshu Wang