BEIJING: China's latest Covid-19 outbreak is increasingly likely to spread further, a health official said on Sunday, as authorities urged all regions to step up monitoring and called for a reduction in travel across provinces.
China has largely contained the virus but it is determined to stamp out any sporadic local outbreaks, particularly in the run-up to the 2022 Winter Olympics in February.
More than 100 locally transmitted cases have been confirmed over the last week across 11 provincial areas, with most linked to 13 different tour groups.
There is increasing risk that the outbreak might spread further, helped by "seasonal factors", Mi Feng, spokesman at the National Health Commission, told reporters on Sunday.
The Delta variant causing the outbreak is also highly transmissible, said commission deputy director Wu Liangyou, adding that sequencing showed it to be different from the source of an earlier outbreak, and suggesting that the new cases came from a new source from abroad.
Authorities have banned travel agencies from arranging cross-provincial tours that involve regions deemed of higher virus risk, and has imposed nationwide suspension on some travel services linking multiple tourist attractions.
The capital Beijing has said it will impose strict restriction on travels to the city by people who have been to counties with at least one infection.
Health authorities also said on Sunday that about 75.6 per cent of China's population had received complete vaccine doses as of October 23, or some 1.068 billion people.
China is giving booster shots to adults whose last dose was at least six months earlier, with priority groups including essential workers, older people and those with weaker immune systems. Data showed antibodies elicited by vaccines, including the most-used shots from Sinovac and Sinopharm, declined within months.
Wang Huaqing, chief expert for the immunization program at the Chinese Center for Disease Control and Prevention, said China would not keep giving people booster shots indefinitely.
"Even if it needs to be strengthened later, the number of boosters is limited," Wang told the briefing. "We hope in the future there will be better vaccines and better vaccination procedures to achieve solid protection among the public."
Meanwhile, the Wuhan Marathon, which had been due to take place on Sunday, has been postponed at short notice as worries increase over a coronavirus resurgence in china ahead of the 2022 Beijing Winter Olympics.
China reported 26 new domestic Covid-19 cases on Sunday, in an outbreak that has become the latest test of the country's zero-tolerance approach with just over 100 days until the start of the Games.
Authorities have been racing to contain virus infections via mass testing of residents and targeted lockdowns.
But with the rise in cases, organisers of the Wuhan Marathon said in a statement released late last week that they would postpone Sunday's event in the central Chinese city "to prevent the risk of epidemic spread".
The marathon was expected to have 26,000 participants taking part in races including full and half marathons in the city where coronavirus was first identified towards the end of 2019.
Next weekend's 40th edition of the Beijing marathon could also be delayed, local media outlet Beijing Daily reported Sunday. Organisers did not immediately respond when contacted by AFP.
As China wrestles with its latest coronavirus spike, authorities on Sunday announced the suspension of cross-provincial tour groups in five areas where cases have been detected, including Beijing.
"The risk that the outbreak spreads further is still increasing," warned National Health Commission spokesperson Mi Feng.
Some cities, including Gansu's provincial capital of Lanzhou, and parts of Inner Mongolia have also suspended bus and taxi services, authorities said. - Agencies
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