English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

I believe that in Egypt, the first phase of the coronavirus disease (COVID-19) pandemic was characterized by symptomless (covert) carriers. Covert carriers are individuals who test positive for the virus on laboratory testing but are symptomless and can shed the virus. Numerous researchers assume that there is an unobserved pool of these carriers because in many cases, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections could not be related to contact with persons with infection or to travel to epidemic areas. Recent studies have revealed that some populations may have up to 50% of covert carriers1. The sequence of events leading up to the current full-blown epidemic may provide some explanation on this aspect. On February 14, 2020, the first case of SARS-CoV-2 infection was confirmed in Egypt in a Chinese national2. He was diagnosed on arrival in Cairo. His lengthy stay in a confined place (the plane) provided a good opportunity for virus shedding (the time required to travel from China to Cairo is nearly 15 hours). Considering the additional time taken to arrive at the testing area, the person had sufficient time for transmitting the virus to the surroundings. At that time, SARS-CoV-2 testing of all contacts showed negative results.

Individuals with covert severe acute respiratory syndrome coronavirus 2 infection: Are they a critical booby-trap?