Funding for this research was provided by:
National Natural Science Foundation of China (81773447)
Chinese National Major Public Health Service projects
Received: 11 October 2020
Accepted: 19 January 2021
First Online: 1 March 2021
Ethics approval and consent to participate
: It was determined by the National Health Commission of the People's Republic of China that the collection of data from HIV-exposed cases was part of continuing public health surveillance of a notifiable infectious disease and was thus exempted from institutional review board assessment.
: Not applicable.
: The authors declare that they have no competing interests.