Question: How should healthcare providers address concerns of patients with underlying medical conditions about  the risk of becoming infected with COVID-19?

Answer passage (source: CDC):
page_title: Healthcare Infection Prevention and Control FAQs for COVID-19
section_headers: During the COVID-19 pandemic, are there special considerations for surgical and other procedural care settings, including performance of aerosol-generating procedures (AGPs)?
section_content: As part of routine practices, healthcare personnel (HCP) should be applying
Standard Precautions. HCP
should always deliberately assess potential risks of exposure to infectious
material before engaging in activities and procedures in healthcare delivery.
Based on their risk assessment, safe work practices, including engineering
controls that reduce the release of infectious material, administrative
controls, and use of personal protective equipment (PPE) should be implemented
at the point of care according to CDC guidelines and standards of practice for
the activity performed.
To reduce SARS-CoV-2 exposure during the COVID-19 pandemic, CDC recommends
that facilities:

consider nonoperative approaches when feasible;
minimize the use of procedures or techniques that might produce infectious aerosols when feasible;
minimize the number of people in the operating or procedure room to reduce exposures;
use the extent of community transmission and an assessment of the likelihood for patient harm if care is delayed to make decisions about cancelling or postponing elective surgeries and procedures; and
implement universal source control measures, which includes having patients wear a cloth face covering (as tolerated) and having HCP wear a facemask at all times while they are in the healthcare facility.

If surgery or procedures cannot be postponed, HCP caring for patients with
suspected or confirmed COVID-19 should adhere to all recommended infection
prevention and control practices for
COVID-19.
This includes:

Using all recommended PPE: an N95 or higher-level respirator (or facemask if respirators are not available), eye protection, gloves, and a gown. 
Respirators with exhalation valves should not be used during surgical procedures as unfiltered exhaled breath would compromise the sterile field.
If shortages exist, N95 or higher-level respirators should be prioritized for procedures involving higher risk techniques (e.g., that generate potentially infectious aerosols) or that involve anatomic regions where viral loads might be higher (e.g., nose and throat, oropharynx, respiratory tract).


As part of routine practice, HCP should also be using additional engineering controls for source control, when applicable (e.g., smoke evacuation devices).

Because COVID-19 can be transmitted asymptomatically, some infected
individuals will not be identified based on clinical signs and symptoms. HCP
providing surgical or procedural care to patients not suspected of having
COVID-19 should use a tiered approach based on the level of community
transmission to inform the need for universal eye protection and respirator
use (see FAQ addressing recommended PPE when caring for asymptomatic patients
who are not suspected to have COVID-19). HCP should continue to use eye
protection or an N95 or higher-level respirator whenever recommended for
patient care as a part of Standard or Transmission-Based Precautions.

Reviewer feedback on this answer:
This highlights what healthcare providers really needs to do for patient with underlying medical conditions.
Off topic this is more about health care procedures and not address concerns
This gives detailed answer and suggestion to the question.

Reviewer ratings:
Excellent
Bad
Excellent