- Correspondence to Dr Shamez Ladhani, Immunisation and Counter-Measures Division, National Infection Service, Public Health England, London NW9 5EQ, UK;
- Received April 16, 2019
- Revised December 2, 2019
- Accepted December 3, 2019
- First published December 23, 2019.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.