People stop at a checkpoint outside the Xinfadi wholesale food market district in Beijing in June.
Several infections in recent months in Qingdao and Tianjin cities involved handlers of imported frozen food. Workers in a particular environment who repeatedly come into contact with cold-chain products polluted by the coronavirus might be infected without proper protection, a Chinese official said earlier on Wednesday.
We have summarized this news so that you can read it quickly. If you are interested in the news, you can read the full text here. Read more: