*For the aim of this steering, fever is outlined as subjective fever (feeling feverish) or a measured temperature of 100.4°F (38°C) or greater. Note that fever could also be intermittent or might not be current in some folks, comparable to those that are aged, immunocompromised, or taking sure fever-reducing medicines (e.g., nonsteroidal anti-inflammatory medication [NSAIDS]).
** Data to tell the definition of shut contact are restricted. Factors to think about when defining shut contact embrace proximity, the period of publicity (e.g., longer publicity time seemingly will increase publicity danger), and whether or not the publicity was to an individual with signs (e.g., coughing seemingly will increase publicity danger). While analysis signifies material face coverings could assist those that are contaminated from spreading the an infection, there may be much less data concerning whether or not material face coverings provide any safety for a contact uncovered to a symptomatic or asymptomatic affected person. Therefore, the willpower of shut contact ought to be made no matter whether or not the individual with COVID-19 or the contact was sporting a material face overlaying. Because most people has not obtained coaching on correct choice and use of respiratory PPE, it can’t be sure whether or not respiratory PPE worn throughout contact with a person with COVID-19 an infection protected them from publicity. Therefore, as a conservative method, the willpower of shut contact ought to usually be made no matter whether or not the contact was sporting respiratory PPE, which is beneficial for well being care personnel and different skilled customers, or a material face overlaying beneficial for most people.
***Data are inadequate to exactly outline the period of time that constitutes a protracted publicity. Recommendations fluctuate on the size of time of publicity, however 15 minutes of shut publicity can be utilized as an operational definition. Brief interactions are much less prone to end in transmission; nonetheless, signs and the kind of interplay (e.g., did the contaminated individual cough straight into the face of the uncovered particular person) stay necessary.
Integration of those definitions and actions into communications and actions of public well being authorities might be guided by CDC’s “Implementation of Mitigation Strategies for Communities with Local COVID-19 Transmissionpdf icon”