1 Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310016, PR China.
2 University of Edinburgh Medical School, Biomedical Sciences, College of Medicine & Veterinary Medicine, The University of Edinburgh, 1 George Square, Edinburgh, EH8 9JZ, UK.
3 Fraunhofer Institute for Cell Therapy & Immunology (IZI), Department of Vaccines and Infection Models, Perlickstr. 1, Leipzig, 04103, Germany.