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Emerg Infect Dis ; 27(2): 352-359, 2021 Feb.
Article in English | MEDLINE | ID: covidwho-961594

ABSTRACT

Virus shedding in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) can occur before onset of symptoms; less is known about symptom progression or infectiousness associated with initiation of viral shedding. We investigated household transmission in 5 households with daily specimen collection for 5 consecutive days starting a median of 4 days after symptom onset in index patients. Seven contacts across 2 households implementing no precautionary measures were infected. Of these 7, 2 tested positive for SARS-CoV-2 by reverse transcription PCR on day 3 of 5. Both had mild, nonspecific symptoms for 1-3 days preceding the first positive test. SARS-CoV-2 was cultured from the fourth-day specimen in 1 patient and from the fourth- and fifth-day specimens in the other. We also describe infection control measures taken in the households that had no transmission. Persons exposed to SARS-CoV-2 should self-isolate, including from household contacts, wear a mask, practice hand hygiene, and seek testing promptly.


Subject(s)
COVID-19/transmission , Disease Transmission, Infectious/statistics & numerical data , Environmental Exposure/statistics & numerical data , SARS-CoV-2/isolation & purification , Virus Shedding , Adolescent , Adult , Child , Disease Transmission, Infectious/prevention & control , Environmental Exposure/prevention & control , Family Characteristics , Female , Humans , Infection Control/methods , Male , Middle Aged , Specimen Handling , Time Factors , Utah
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