Yes, in some cases cancer can be caused through a viral vector, like certain sexually transmitted HPV viruses. In a minority of cases, if the immune system for whatever reason cannot eliminate the sexually transmitted HPV, then there is a risk the HPV can cause cervical cancer in women. Even so, that isn't the same process of transmission by viral and bacteria diseases.
The contribution of Chinese travellers in global tourism ranked first in the world in 2019 when Chinese tourists spent about 250 Billion USD while traveling abroad. So yeah only 13% maybe has a passport but boy … do they love to travel and spent spent spent. Comparing Chinese domestic travel with overseas travel is hmmm ….. not comparable.
Vaccines are here. Countries around the world are making vaccines more or less mandatory step by step yet here we are vulnerable still and the ignorant are being pandered to and costing all of us as a result.
Spoiler—the committee came back in 90 days with “we don’t know” and the whole thing was forgotten