Change description : 2022-05-13 16:46:00: Added HTML attachment for accessibility purposes. Some HTML images have minor formatting differences to improve accessibility of images. [Coronavirus (COVID-19)]
This file may not be suitable for users of assistive technology.
Request an accessible format.
If you use assistive technology (such as a screen reader) and need a
version of this document in a more accessible format, please email email@example.com.
Please tell us what format you need. It will help us if you say what assistive technology you use.
These documents are released as pre-print publications that have provided the government with rapid evidence during an emergency. These documents have not been peer-reviewed and there is no restriction on authors submitting and publishing this evidence in peer-reviewed journals.
Redactions in this document have been made to remove any security markings.