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Another shows her family and other farmers hiking over earthen roads with sacks of belongings slung over their shoulders as they trekked to their new, modern dwellings in Tongren.

Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, attends a Senate Health, Education, Labor and Pensions Committee hearing on efforts to get back to work and school during the coronavirus disease (COVID-19) outbreak, in Washington, June 30, 2020. [Photo/Agencies]

Another issue is to ensure that individual workers have enough say when disputes with platforms occur, he said.

Another important aspect of the vaccine is that it has the potential to be personalized. The genetic makeup of cancer varies from patient to patient, so a treatment that is effective in one person might not work as well in another. In this study, the vaccine for each mouse was developed using its own stem cells, ensuring genetic similarity between the vaccine and the host's cancer. This suggests that, in future, cells could be taken from at-risk individuals to create tailored vaccines.

Apart from the salary cut for the delivery unit, JD is seeing a round of shake-ups on its management team. Following recent resignations of its chief technology officer Zhang Chen and chief legal officer Long Yu, the tech giant announced last week that Lan Ye, its chief public affairs officer, would be leaving his post for "personal and family reasons" on May 31.