*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 will not be current in some folks, comparable to those that are aged, immunocompromised, or taking sure fever-reducing medicines (e.g., nonsteroidal anti-inflammatory medicine [NSAIDS]).
** Data to tell the definition of shut contact are restricted. Factors to think about when defining shut contact embody proximity, the length of publicity (e.g., longer publicity time probably will increase publicity threat), and whether or not the publicity was to an individual with signs (e.g., coughing probably will increase publicity threat). While analysis signifies material face coverings could assist those that are contaminated from spreading the an infection, there may be much less data relating to 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 needs to be made no matter whether or not the particular person with COVID-19 or the contact was carrying a material face protecting. Because most of the people has not acquired 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 carrying respiratory PPE, which is really helpful for well being care personnel and different skilled customers, or a material face protecting really helpful for most of the people.
***Data are inadequate to exactly outline the length of time that constitutes a protracted publicity. Recommendations differ 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 more likely to lead to transmission; nevertheless, signs and the kind of interplay (e.g., did the contaminated particular person cough instantly into the face of the uncovered particular person) stay vital.
Integration of those definitions and actions into communications and actions of public well being authorities could be guided by CDC’s “Implementation of Mitigation Strategies for Communities with Local COVID-19 Transmissionpdf icon”