COVID-19: Operational Considerations for Non-US Settings

1. Background

2. Target Audience

3. Objectives

4. Definitions

• Close contact with a person with COVID-19 in the community[1]; OR
• Providing direct patient care for a patient with COVID-19 (e.g., physical exam, nursing care, performing aerosol-generating procedures, specimen collection, radiologic testing) without using proper personal protective equipment (PPE)^[2] or not performing appropriate hand hygiene after these interactions; OR
• Having contact with the infectious secretions from a patient with COVID-19 or contaminated patient care environment, without using proper personal protective equipment (PPE) or not performing appropriate hand hygiene

Low risk exposure – contact with a person with COVID-19 having not met criteria for high-risk exposure (e.g., brief interactions with COVID-19 patients in the hospital or in the community).

Active monitoring – healthcare facility or public health authority establishes a minimum of daily communication with exposed HCWs to assess for the presence of fever or symptoms consistent with COVID-19^[3]. Monitoring could involve in-person temperature and symptom checks or remote contact (e.g., telephone or electronic-based communication).

Self-monitoring – HCWs monitor themselves for fever by taking their temperature twice a day and remaining alert for respiratory and other symptoms that may be compatible with COVID-19. HCWs are provided a plan for whom to contact if they develop fever or even mild symptoms during the self-monitoring period to determine whether medical evaluation and testing is needed.

5. Considerations when Managing HCWs Exposed to Individuals with COVID-19

The accompanying flowchart [see Figure] describes possible scenarios for risk assessment of exposed HCWs. Any HCW exposed to a person with COVID-19 in a healthcare facility or in the community should be quickly identified and assessed for fever or symptoms of COVID-19. If found to be symptomatic, they should be immediately restricted from work until a medical evaluation can be completed and testing for COVID-19 considered. If the exposed worker is not symptomatic, an assessment can be done to determine the risk category of exposure, necessary work restriction, and monitoring for 14 days [see Appendix 1].

Ideally, HCWs who had a high-risk exposure should be restricted from work and remain quarantined with active monitoring for COVID-19 symptoms for 14 days after the date of last exposure. If at any time the worker develops fever or symptoms, they should undergo medical evaluation and COVID-19 testing, if indicated. Those who test negative should continue to be restricted from work, actively monitored, and may return to work at the end of the monitoring period if symptoms are resolved. Those HCWs who remain asymptomatic over the monitoring period may likewise return to work after 14 days. See below Considerations When Resources are Limited for alternative strategies if staffing shortages prevent the ability to restrict HCWs from work.

HCWs who had a low-risk exposure and are considered essential staff may continue to work during the 14 days after their last exposure to a patient with COVID-19. These HCWs should preferably be assigned to care for patients with COVID-19 and should perform self-monitoring twice a day. If the worker is scheduled for a shift, they should take their temperature and self-evaluate for symptoms before reporting to work. Healthcare facilities can consider establishing protocols in which HCWs under self-monitoring report their temperature and symptom status to IPC staff, employee/occupational health, or a designated supervisor prior to beginning a shift. If the HCW develops fever or symptoms, they should:

• Not report to work (or should immediately stop patient care if symptoms begin during a work shift);
• Alert their designated point of contact (POC);
• Be restricted from work until medical evaluation and COVID-19 testing can be performed.

If testing is negative and symptoms are resolved, they may return to work while observing standard precautions and continuing to self-monitor for the remainder of the 14 days. Some facilities have instructed any exposed staff that continue working during the 14 days post-exposure (e.g., asymptomatic low-risk exposure or staff who had symptoms, tested negative and returned to work within the exposure period) to wear a medical mask at all times in the facility to reduce the risk of asymptomatic or pre-symptomatic transmission.

Any HCW who tests positive for COVID-19, either in the course of monitoring after an exposure or otherwise, should be immediately restricted from work and public health notified for further case management.

Considerations When Resources are Limited

• Inability to perform contact tracing
  Healthcare delivery and traffic flow in a healthcare facility can be dynamic, and documentation of staffing assignments may not be routine practice. This has made it challenging for some healthcare facilities to identify all HCWs who had contact with a case. In situations where identifying all exposed HCWs is not possible, facilities have sent a general communication to all facility staff informing them of:
  • Exposure risk;
  • Associated facility location(s);
  • Date(s) and time(s) for potential exposure;
  • Instructions for staff to self-identify any known exposures and to notify the designated POC so that risk assessment and public health recommendations can be made;
  • Instructions for staff to self-monitor for fever or respiratory symptoms for a chosen period of time and to notify the POC if they become ill.
• Inability to perform individual HCW risk assessments
  If many HCWs were exposed to a case or there are limited IPC, employee/occupational health, or public health staff available to assist with public health management, some facilities have found it impractical or impossible to perform individual risk assessments on all exposed HCWs. Efforts have instead focused on identifying staff at highest risk of exposure to COVID-19, including those who were exposed in the setting of an aerosol-generating procedure[4] without the use of appropriate PPE, since this would pose the highest risk of transmission to the HCW. These staff have been designated as potential high-risk exposures, with the remaining exposed staff as potentially exposed. Facilities and public health authorities then determined whether they will manage these staff as low-risk or high-risk while weighing the risks and benefits of each strategy (e.g., available resources, ability to work restrict HCWs, etc.).

Limited Testing Availability

When overall testing capacity has been limited and must be rationed, facilities and public health authorities have prioritized symptomatic HCWs for testing over low-risk groups in the community (e.g., young healthy individuals). If no testing is available, for the purposes of returning to work, these HCWs have been managed as if potentially infected with SARS-CoV-2 and can return to work based on the strategies described below.

6. Management Considerations of HCWs with Suspected or Confirmed COVID-19

Previous U.S. CDC and WHO recommendations included a symptom-based strategy and a test-based strategy for returning HCWs with suspected or confirmed COVID-19 to work or discontinue isolation. As described in a Decision Memo, U.S. CDC no longer recommends a test-based strategy based on current evidence. This is consistent with a WHO Scientific Briefexternal icon on discontinuation of isolation for COVID-19. Replication-competent virus has not been recovered after 10 days following symptom onset among individuals with mild to moderate COVID-19 illness. In severely or critically ill patients, including some with severely immunocompromising conditions, an estimated 95% no longer have replication-competent virus 15 days after onset of symptoms. While individuals may continue to shed detectable SARS-CoV-2 RNA beyond these time points, a test-based strategy is no longer recommended, with rare exception, because in the majority of cases it results in excluding from work HCWs who continue to shed virus but are no longer infectious.

U.S. CDC recommendations for a symptom-based strategy to determine when HCWs can return to work:

HCWs with mild to moderate illness ^[5] who are not severely immunocompromised ^[6]:

• At least 10 days have passed since symptoms first appeared and
• At least 24 hours have passed since last fever without the use of fever-reducing medications and
• Symptoms (e.g., cough, shortness of breath) have improved

Note: HCWs who are not severely immunocompromised and were asymptomatic throughout their infection may return to work when at least 10 days have passed since the date of their first positive viral diagnostic test.

HCW with severe to critical illness5 or who are severely immunocompromised:

• At least 10 days and up to 20 days have passed since symptoms first appeared and
• At least 24 hours have passed since last fever without the use of fever-reducing medications and
• Symptoms (e.g., cough, shortness of breath) have improved
• Consider consultation with infection control experts

Note: HCWs who are severely immunocompromised but who were asymptomatic throughout their infection may return to work when at least 10 days and up to 20 days have passed since the date of their first positive viral diagnostic test.

The exact criteria that determine which HCWs will shed replication-competent virus for longer periods are not known. Disease severity factors and the presence of immunocompromising conditions should be considered in determining the appropriate duration of isolation (see footnotes 5 and 6). Consultation with infection control experts should be considered to determine the optimal time for an individual HCW to return to work.

Per the WHO Scientific Briefexternal icon, countries can choose to continue to use a laboratory testing algorithm as part of the criteria for releasing infected individuals from isolation. Countries that decide to adopt a test-based strategy for returning HCWs to work should take into consideration the limitations of this approach, including HCWs who continue to shed virus but are no longer infectious and strain on testing resources.

CDC and WHO recommend all HCWs wear a medical mask for universal source control if there is SARS-CoV-2 transmission in the community. For countries that are not using medical masks for universal source control, HCWs returning to work after SARS-CoV-2 infection should wear a medical mask at all times while in the healthcare facility until all symptoms are completely resolved or at baseline. After returning to work, HCWs should continue to adhere to hand hygiene, respiratory hygiene, and cough etiquette at all times, and continue to self-monitor for symptoms, seeking medical evaluation if fever or respiratory symptoms worsen or recur.

CDC testing and return to work guidance is based upon currently available evidence and is subject to change as more information becomes available. Please see CDC Criteria for Return to Work for Healthcare Personnel with Suspected or Confirmed COVID-19 (Interim Guidance) for further updates to these recommendations.