China has five coronavirus vaccines in the final stages of development -- but none has received official approval from authorities and the results of late-stage trials have yet to be published.
The ministry opened registration for the vaccination campaign through an online application called "Sehaty", and said the vaccine would be "free for all citizens and residents".
The US has the world's highest death toll of more than 299,000, and the largest number of cases, at 16.2 million -- including more than 1.5 million new cases in just the past week.
Cervical cancer is a completely preventable disease because of its well defined, long pre-malignant phase and it can be detected easily by regular screening tests and follow up.
In the new study, published in The Journal of Clinical Investigation, the research team tested the blood of more than 6,000 healthcare workers for evidence of antibodies to SARS-CoV-2.