A-Z Index
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ALL
Instagram Facebook Twitter Youtube
Reporting LAHAN Alerts
banner

Coronavirus Disease 2019

Infection Prevention Guidance for Healthcare (including EMS) Personnel


Summary of Recent Changes
Significant changes to this guidance include the following

1-4-24

  • Effective 12-27-2023, the County Health Officer Order Annual Immunization or Masking and Addition of Updated COIVD-19 Immunization or Masking Requirement for Healthcare Personnel During the 2023-2024 Respiratory Season requires the following measures:
    • Healthcare workers who are not vaccinated against both Influenza and COVID-19 must wear a respiratory mask for the duration of the annual respiratory season, November 1 – April 30.
    • Healthcare workers must wear a mask while in patient care areas of licensed inpatient settings (see order for definitions) when the Los Angeles County CDC COVID-19 Hospital Admission Level is medium or above.
Key Points
  • Your healthcare facility and EMS provider agency is responsible for developing and executing your facility/agencies’ plan to decrease risk of COVID-19 exposure from potentially infectious healthcare personnel (HCP), which include EMS personnel.
  • HCP refers to clinical and non-clinical staff within your healthcare facility or EMS agency.
  • All HCP should self-monitor for symptoms of COVID-19.
  • HCP are required to wear masks for source control when providing care to or working in-person with a patient or are in patient care areas. HCP with SARS-CoV-2 infection permitted to return to work are required to wear a mask at all times at work when around others through at least Day 10.
Introduction

These guidelines are intended to support healthcare facilities and EMS Provider Agencies (both referred to as HCF for short in this guidance) with locations in LA County.

HCF are required to follow County COVID-19 Health Officer Orders, California All Facilities Letters (AFLs), and Cal/OSHA regulations including the return to work for exposed and infected workers:

Where the requirements differ, the more stringent (protective) directives apply.

HCF are required to also follow the Cal/OSHA Aerosol Transmissible Disease (ATD) standard that require the use of N95 respirators for worker protection during the care of suspect or confirmed COVID-19 cases. Finally, HCF should refer to the following CDC COVID-19 guidelines for healthcare personnel:

Employers and facilities can have policies that are more protective than those required by County Health Officer Orders, CA AFLs, and Cal/OSHA or recommended by the CDC.

COVID-19 Vaccination

CDC, CDPH, and LAC DPH urge everyone to remain up to date with COVID-19 vaccination to protect themselves and reduce the spread of the virus. See CDC Stay Up to Date with COVID-19 Vaccines for more information. Visit CDPH vaccine schedules in English and Spanish.

Source Control
  • Effective 12-27-2023, the County Health Officer Order Annual Immunization or Masking and Addition of Updated COIVD-19 Immunization or Masking Requirement for Healthcare Personnel During the 2023-2024 Respiratory Season requires the following measures:
    • Healthcare workers who are not vaccinated against both Influenza and COVID-19 must wear a respiratory mask for the duration of the annual respiratory season, November 1 – April 30.
    • Healthcare workers must wear a mask while in patient care areas of licensed inpatient settings (see order for definitions) when the Los Angeles County CDC COVID-19 Hospital Admission Level is medium or above.
  • HCP with SARS-CoV-2 infection who are permitted to return to work must wear a mask at all times while at work around others, including non-patients, through at least Day 10. An N95 is required for source control for infected HCP permitted to return to work before meeting routine criteria (i.e., critical staffing shortage). See Return to Work Protocol for HCP with Confirmed COVID-19.
  • HCF must make N95 respirators available to any HCP who wishes to wear one when not otherwise required.
  • Exposed HCP should wear a mask at all times while they are at work around others, including non-patients, through Day 10. See Management of Exposed Asymptomatic HCP.
Symptom Monitoring
  • HCF need to communicate that HCP with symptoms of COVID-19 and/or a positive COVID-19 test must not enter the premises.
  • All HCP should routinely self-monitor for symptoms of possible COVID-19.
  • HCP with symptoms of COVID-19 should be restricted from the workplace pending SARS-CoV-2 diagnostic testing.
Evaluating HCP with Symptoms of COVID-19

HCP with symptoms of COVID-19 should be prioritized for SARS-CoV-2 viral testing (and other respiratory viral testing, such as influenza, as indicated), even if the symptoms are mild.


  • A single negative NAAT result is sufficient in most circumstances. If there is a higher level of clinical suspicion for SARS-CoV-2 infection, consider maintaining work restrictions and confirming with a second negative NAAT.
  • A negative antigen test result should be confirmed by either a negative NAAT or a second negative antigen test collected 48 hours after the first negative test.

For HCP who were initially suspected of having COVID-19 but, following evaluation, another diagnosis is suspected or confirmed, return-to-work decisions should be based on their other suspected or confirmed diagnoses.

See CDC Interim Guidance for Managing HCP with SARS-CoV-2 Infection.

Management of Asymptomatic Exposed HCP

SNFs must and other HCFs should determine the exposure risk for HCP with potential exposure to a confirmed COVID-19 case in a health care setting (see box). CDPH guidance for assessing community-related exposures should continue to be applied to HCP with potential exposures outside of work and among HCP exposed to each other while working in non-patient care areas (e.g., administrative offices). To see the definition of a close contact in the community, see CDPH Guidance on Isolation and Quarantine of the General Public.

Exposure Risk Assessment for HCP

In the healthcare setting, the following exposures to a confirmed infectious COVID-19 case* are considered high-risk:

  1. HCP was not wearing a respirator (or if wearing a facemask, the person with SARS-CoV-2 infection was not wearing a cloth mask or facemask).
  2. HCP was not wearing eye protection if the person with SARS-CoV-2 infection was not wearing a cloth mask or facemask.
  3. HCP was not wearing all recommended PPE (i.e., gown, gloves, eye protection, respirator) while performing an aerosol-generating procedure.

*COVID-19 cases are considered to be infectious beginning 2 days prior to symptom onset (or initial positive viral test if case is asymptomatic) until the time they meet criteria for discontinuing isolation.

See CDC for more details regarding risk assessment of exposed HCP: cdc.gov/coronavirus/2019-ncov/hcp/guidance-risk-assesment-hcp.html

HCP with higher-risk exposures may continue to work, as long as they do not develop symptoms or test positive for SARS-CoV-2. SNFs must and other HCFs should follow the table below to guide the management of asymptomatic HCP with exposures based upon the facility/agency staffing level.

Exposed HCP should wear a mask at all times while at work around others (including non-patients) through Day 10. To provide an additional layer of safety, an N95 respirator is recommended until they have a negative test result on day 5.

Table 1.Management of Asymptomatic HCP with Exposures

Vaccination Status Routine Critical Staffing Shortage
All HCP, regardless of vaccination status No work restriction with negative diagnostic test upon identification (but not earlier than 24 hours after exposure) and if negative, test at days 3 and 5. No work restriction with diagnostic test upon identification (but not earlier than 24 hours after exposure) and at days 3 and 5.^

Either an antigen test or nucleic acid amplification test (NAAT) can be used. In general, post exposure testing of asymptomatic HCP who have recovered from SARS-CoV-2 infection in the prior 30 days is not recommended. If the exposed HCP’s first positive prior test was 31-90 days ago, then antigen testing is recommended.

^ If most recent test is positive, see Table 2 Work Restrictions for HCP with SARS-CoV-2 Infection.

For more details refer to AFL 21-08.9 and Cal/OSHA FAQs.

Screening Recommendations

Screening testing (i.e., testing of asymptomatic persons with no known or suspected exposures to COVID-19) is not routinely recommended. During periods of high community transmission of COVID-19, LAC DPH may recommend this practice.

Return to Work Protocol for HCP with Confirmed COVID-19

HCP with SARS-CoV-2 infection must be excluded from the workplace for at least 5 days and at least one negative diagnostic test is required prior return to the workplace before Day 10, with exceptions for critical staffing shortages. SNFs must and other HCFs should follow the table below to guide the return to work based upon the facility/agency staffing level.

HCP returning to work after meeting routine criteria must wear a mask at all times while at work around others (including non-patients) through at least Day 10. To provide an additional layer of safety, a fit-tested N95 is recommended. Note: an N95 is required for source control for infected HCP permitted to return to work before meeting routine criteria (i.e., critical staffing shortage.

Table 2.Work Restrictions for HCP with SARS-CoV-2 Infection (Isolation)

Vaccination Status Routine Critical Staffing Shortage
All HCP, regardless of vaccination status 5 days* with at least one negative diagnostic test same day or within 24 hours prior to return OR
10 days without a viral test
<5 days with most recent diagnostic test result to prioritize staff placement

*Asymptomatic or mildly symptomatic with improving symptoms and meeting negative test criteria; facilities should refer to CDC guidance for HCP with severe to critical illness or moderately to severely immunocompromised.

† Either an antigen test or nucleic acid amplification test (NAAT) can be used. Some people may be beyond the period of expected infectiousness but remain NAAT positive for an extended period. Antigen tests typically have a more rapid turnaround time but are often less sensitive than NAAT. Antigen testing is preferred for return-to-work testing for SARS-CoV-2 infected HCP and for HCP who have recovered from SARS-CoV-2 infection in the prior 90 days; NAAT is also acceptable if done and negative within 48h of return.

Critical staffing shortages: If most recent test is positive, then HCP may provide direct care only for patients/residents with confirmed SARS-CoV-2 infection, preferably in a cohort setting. This may not apply for staff types or in settings where practically infeasible (e.g., Emergency Departments where patient COVID status is unknown) or where doing so would disrupt safe nurse to patient ratios, and for staff who do not have direct patient/resident care roles. The HCP must maintain separation from other HCP as much as possible (for example, use a separate breakroom and restroom) and wear a N95 respirator for source control at all times while in the facility until they meet routine return to work criteria).

For more details refer to AFL 21-08.9 and Cal/OSHA FAQs.

Contact Us

If you have questions, email LAC DPH at ACDCPhyConsult@ph.lacounty.gov or call at 213-240-7941.




Public Health has made reasonable efforts to provide accurate translation. However, no computerized translation is perfect and is not intended to replace traditional translation methods. If questions arise concerning the accuracy of the information, please refer to the English edition of the website, which is the official version.

Los Angeles County Seal: Enriching lives through effective and caring services