BEIJING, Aug. 3 (Xinhua) -- Local authorities in China have taken swift actions to curb the spread of the highly infectious Delta variant of the novel coronavirus, as COVID-19 cases related to this strain have been detected in more than a dozen Chinese provinces and municipalities.
The Chinese mainland on Monday reported 61 new locally transmitted COVID-19 cases, the National Health Commission said in its daily report on Tuesday. Forty-five cases were reported in Jiangsu, six in Hunan, three in Hubei, two each in Henan and Yunnan, and one each in Beijing, Shanghai, and Fujian, according to the commission.
As of Monday, 1,157 confirmed COVID-19 cases were in hospital in the mainland, including 698 imported ones, the commission said.
East China's Jiangsu Province, where the recent airport-related cluster infections of Delta variant occurred, had 327 confirmed local cases receiving medical treatment as of Monday, local health authorities said.
EFFORTS TO CUT VIRUS TRANSMISSION
The Chinese capital of Beijing on July 27 saw the first resurgence of COVID-19 in months, prompting the municipal government to upgrade the epidemic prevention and control measures.
Pang Xinghuo, deputy director of the Beijing center for disease control and prevention, said at a press briefing on Monday that the epidemic prevention and control is again at a critical stage, as cluster infections have been reported in many areas in China.
Beijing on Sunday imposed strict entry and exit controls, asking all residents to minimize their travels and avoid gatherings.
Changping and Fangshan districts of the city, where four confirmed cases were reported, have carried out environment disinfection in residential communities.
The fifth case in this wave was reported on Monday in a residential community in Haidian District. The community and its surrounding areas, involving more than 10,000 people, have been put under closed-off management, and nucleic acid testing is being carried out.
The city has capped personnel flow under 60 percent in all parks, scenic spots, performance venues, and other sites that witness gatherings.
Zhengzhou, capital of central China's Henan Province that saw devastating floods last month, launched an emergency measure on Sunday to deliver daily necessities after the city reported an asymptomatic case on Friday.
Food items such as noodles, flour and vegetables were delivered to communities in the city's Erqi District, where confirmed cases were reported.
The city reported 13 locally transmitted confirmed COVID-19 cases and 50 asymptomatic cases as of 6 p.m. Monday.
Zhengzhou, a city with more than 10 million people, launched a citywide nucleic acid testing on Sunday, and upgraded its COVID-19 control level, requiring all people leaving the city to show proof of negative results of nucleic acid tests taken within 48 hours.
Inspection teams have been deployed at the airport, railway stations and expressway toll gates for checking the COVID-19 negative certificates.
Most of the infections were linked to the sixth people's hospital of Zhengzhou, which has been closed for environmental disinfection. All patients and asymptomatic carriers have been transferred to a designated COVID-19 treatment hospital.
Jiangsu province has ramped up measures to contain the virus spread in crowded indoor places.
Of the total 45 confirmed local cases reported in the province on Monday, Yangzhou City, a popular tourist destination, registered 40 cases, pushing up the total number of confirmed local cases in the city to 94 since July 20.
A total of 1.7 million people in the main districts of Yangzhou have completed their second round of nucleic acid testing.
Starting from July 28, indoor entertainment venues, indoor cultural and sports centers, training institutions, and childcare centers in the city have been temporarily closed to contain the further spread of the virus.
Wuhan, capital of Hubei Province, once hard-hit by the COVID-19 epidemic, is also battling a fresh resurgence of infections.
The city has mobilized all forces after it reported confirmed cases linked to the highly infectious Delta variant last week, ending a streak of more than a year with zero locally transmitted cases.
Hubei reported three new locally transmitted confirmed COVID-19 cases on Monday, all in Wuhan, the provincial health commission said Tuesday.
Wuhan on Tuesday launched mass nucleic acid testing covering all its residents.
The testing will be completed as soon as possible to screen nucleic acid positive and asymptomatic infections, said Li Tao, deputy secretary general of Wuhan municipal government, at a press briefing on Tuesday.
As of July 20, over 17.1 million doses of COVID-19 vaccines have been administered in Wuhan, and the inoculation rate of people aged 18 and above has reached 77.63 percent, according to the Wuhan municipal health commission.
VACCINATION EFFECTIVE IN COVID-19 PREVENTION
A staffer working with international cargo flights at the Shanghai Pudong International Airport tested positive for COVID-19 on Monday, local health authorities said.
The metropolis immediately carried out the investigation, disinfection, sampling, and laboratory testing on relevant personnel and places, according to the municipal COVID-19 prevention and control leading group office.
"Vaccination has been proved effective in COVID-19 prevention," said Zhang Wenhong, head of the Center for Infectious Diseases at the city's Huashan Hospital, Fudan University, on Tuesday.
Nearly 1.69 billion doses of COVID-19 vaccines had been administered in China by Monday, the National Health Commission said Tuesday.
"If residents are fully vaccinated, the speed of the coronavirus transmission will greatly reduce. All staff members of airports in Shanghai have been vaccinated, so we are fully confident to slow down the transmission," he said.
By 9 a.m. Tuesday, 27,174 of 64,860 screened individuals had completed nucleic acid testing with negative results, while the remaining samples are undergoing examination.
Zhang suggested that all residents should check whether their intended tourist destinations are medium or high-risk areas before traveling. He also encouraged tourists to follow personal protection measures, including wearing masks, washing hands frequently, and avoiding gatherings.
The municipal government has strengthened closed-loop management including beefing up inspection of entry and exit as well as key personnel. It is also promoting vaccination and encouraging citizens to follow COVID-19 preventative measures.
Similar to the recent resurgence of coronavirus in Guangzhou, south China's Guangdong Province, which was also triggered by the highly contagious Delta variant, most patients in this outbreak have shown mild symptoms, said China's top epidemiologist Zhong Nanshan.
Preliminary studies on Guangzhou's latest COVID-19 outbreak show that China's domestic vaccines are effective against the Delta variant, Zhong said during a summit in Guangzhou on Saturday.
The protective effect of China's domestic vaccines is 100 percent effective against severe cases, 76.9 percent against moderate cases, 67.2 percent against mild ones, and 63.2 percent against asymptomatic carriers accordingly. Enditem