@coldjoint,
As of 19 March 2020, Covid-19 is no longer considered to be a HCID. (In January 2020, public health officials in the UK designated Covid-19 a HCID, using the information they had access to in the early stages of the country's outbreak.)
Since this is so important for you - I'd thought, you lived in the USA, but I might be wrong - you certainly know what it means.
For the others: HCID in the UK is defined according to the following criteria:
Quote:acute infectious diseasetypically has a high case-fatality ratemay not have effective prophylaxis or treatmentoften difficult to recognise and detect rapidlyability to spread in the community and within healthcare settingsrequires an enhanced individual, population and system response to ensure it is managed effectively, efficiently and safely
HCIDs are then further classified into two groups - contact and airborne HCIDs. The former are spread by direct contact with an infected patient or infected tissues, fluids and other materials - or indirect contact with contaminated materials and fomites (objects or materials which are likely to carry infection).
The latter are spread by aerosol transmission or respiratory droplets in addition to the contact routes of transmission.
Since several features of the Covid-19 coronavirus have changed in the interim between January and March, meaning the virus no longer matches enough HCID criteria to be considered one.