Researchers in Brazil have reported two cases of coronavirus-infected people who have mild symptoms, transmitting the infectious virus for a longer period than previously reported. Researchers say according to the pre-press site medRxiv Who has not yet been reviewed, the results indicate that individuals who suffer from: Mild symptoms They can remain contagious for long periods, highlighting the need for them to take appropriate precautions to avoid spreading the virus to others.
Patients who had mild but long-term symptoms of Coronavirus disease still had a recurrence of the virus, up to 37 days (in case 1) and 24 days (in case 2) after symptoms appeared.
Mild Corona patients
What have the studies shown so far?
Since the outbreak began COVID-19 For the first time in Wuhan, China, late last year (2019), research indicated that the virus can be detected among infected individuals one to 3 days before symptoms appear.
The viral load reaches its peak within the first week of symptoms before it gradually decreases over time, and studies have estimated that the virus that is eligible to replicate is no longer present in patients with COVID-19 20 days after symptoms appear.
What did the current study include?
Now, the University of Sao Paulo team has shown that in two women infected with the Coronavirus, with mild disease, the virus has been shown to be able to reproduce for a longer period than was previously reported.
The first case (case 1) of a woman in her 50s reported in mid-April that she had first experienced a dry cough, headache, loss of strength, joint pain, and muscle aches, but no fever, 20 days earlier.
After 22 days of the onset of symptoms, a swab was taken from the nasopharynx of a woman who had tested positive for the Coronavirus, and then the woman developed nausea, vomiting, and a loss of the sense of taste and smell.
Significant symptoms persisted, and 37 days after the onset of symptoms, a second pharyngeal swab was tested positive for the virus, and although the woman was still reporting mild headache and loss of strength in mid-May, most of the symptoms gradually disappeared.
The second woman (case 2), who is also in her 50s, reported a fever, headache, sore throat, cough, loss of strength, joint pain, muscle pain, nasal fluid secretions, and nausea at the beginning of May.
A nasopharyngeal swab test was performed 5 days after the onset of symptoms and was tested positive for Corona, and after symptoms persisted, a second pharyngeal swab was taken 24 days after the onset of symptoms, which showed that the woman was still infected, and case 2 remained symptomatic for 35 Almost a day after it appeared.
According to WHO recommendations (WHOWith regard to criteria for discharging individuals with coronavirus from isolation, patients should recover clinically and be symptom-free, the researchers say, and they write: “Our data confirms that even individuals with mild symptoms are likely to be contagious.”