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CDC officials said during a webinar with physicians on Saturday that patients with a history of severe reaction should take precautions as there are two documented cases of anaphylaxis in British health-care workers who received the Pfizer/BioNTech vaccine.
By the end of last month, passengers had bought a total of 872 million electronic tickets, according to the company.
By the end of 2017, the number of coal mines in China dropped to about 7,000 from 10,800 in 2015, said Jiang Zhimin, vice-president of the China National Coal Association.
By early afternoon, the market had clawed back some losses, but the Dow remained down 1846.24 points and the S&P 500 remained down 7.1 percent. Nasdaq was down 6.14 percent.
CASC has also begun to research a super-heavy carrier rocket with a lift off weight of 3,000 tons and capable of thrusting a 140-ton spacecraft to a low Earth orbit. The rocket will be tasked with fulfilling China's manned missions to the moon, said company executives.
来源：资阳报