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The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...
In computing and telecommunications, the payload is the part of transmitted data that is the actual intended message. Headers and metadata are sent only to enable payload delivery [1] [2] and are considered overhead . In the context of a computer virus or worm, the payload is the portion of the malware which performs malicious action.
Health Code ( Chinese: 健康 码, Jiànkāngmǎ) is [needs update] a type of application used during COVID-19 [1] in mainland China. It was used as an e-passport that reports if the user has been in an area with current cases of infection. An applicant provides information such as travel history, residence, and medical records.
The host protein neuropilin 1 (NRP1) may aid the virus in host cell entry using ACE2. After a SARS‑CoV‑2 virion attaches to a target cell, the cell's TMPRSS2 cuts open the spike protein of the virus, exposing a fusion peptide in the S2 subunit, and the host receptor ACE2.
Viral load, also known as viral burden, is a numerical expression of the quantity of virus in a given volume of fluid, including biological and environmental specimens. It is not to be confused with viral titre or viral titer, which depends on the assay. When an assay for measuring the infective virus particle is done (Plaque assay, Focus assay ...
In January 2020, the WHO recommended 2019-nCoV and 2019-nCoV acute respiratory disease as interim names for the virus and disease per 2015 international guidelines against using geographical locations (e.g. Wuhan, China), animal species, or groups of people in disease and virus names in part to prevent social stigma.
Mostly classified assessment. Assessment on COVID-19 Origins [1] is a 2021 United States intelligence report, which was commissioned in May 2021 by President Joe Biden and declassified in August of the same year. Biden initially ordered his intelligence services to "redouble efforts" concerning the origins of the SARS-CoV-2 virus. [2]
Sample analyses resulted in little data due to the rarity of experimental material. The researchers, however, were able to hypothesize a phylogeny from the gathered data. They were also able to use the molecular clock of a specific strain of HIV to determine the initial date of transmission, which is estimated to be around 1915–1931.