This
 document provides technical guidance for government authorities, health
 workers, and other key stakeholders to guide response to community 
spread. It will be updated as new information or technical guidance 
become available. For countries that
    are already preparing or responding, this document can also serve as
 a checklist to identify any remaining gaps.
This
 document is intended to guide the care of COVID-19 patients as the 
response capacity of health systems is challenged; to ensure that 
COVID-19 patients can access life-saving treatment, without compromising
 public health objectives and safety of health
    workers.
It promotes two key messages: 
1. Key public health interventions regardless of transmission scenario; and 
2. Key action steps to be taken by transmission scenario to enable timely surge of clinical operations.
Prioritized Laboratory Testing Strategy According to 4Cs Transmission Scenarios
Diagnostic
 testing for COVID-19 is critical to tracking the virus, understanding 
epidemiology, informing case management, and to suppressing 
transmission. This document describes the strategic use of diagnostic 
testing in different transmission scenarios
    of the COVID-19 outbreak, from no cases to community transmission, 
including how testing might be rationalized when lack of reagents or 
testing capacity necessitates prioritization of certain populations or 
individuals for testing.”

 
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