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  2. Got a Faint Line on a COVID-19 Home Test? Here's What ... - AOL

    www.aol.com/got-faint-line-covid-19-145700240.html

    "A faint positive line on a home test after recovering from COVID-19 symptoms is an indication of viral proteins being present — therefore, that person may be still contagious."

  3. What does a faint line on a rapid COVID-19 test mean? - AOL

    www.aol.com/faint-line-covid-19-test-225851470.html

    The only situation in which you wouldn't assume that a faint line on a rapid test is positive is if it turned positive after the allotted testing period, Garner says. "If you just left the test ...

  4. Does a Faint Line on a COVID Test Mean You Have COVID? - AOL

    www.aol.com/does-faint-line-covid-test-130000248...

    “A faint line on a COVID test means the test is positive,” says infectious disease expert Amesh A. Adalja, M.D., a senior scholar at the Johns Hopkins Center for Health Security.

  5. Dühring's rule - Wikipedia

    en.wikipedia.org/wiki/Dühring's_rule

    Dühring's plot for boiling point of NaCl solutions [1]. Dühring's rule is a scientific rule developed by Eugen Dühring which states that a linear relationship exists between the temperatures at which two solutions exert the same vapour pressure.

  6. Heterophile antibody test - Wikipedia

    en.wikipedia.org/wiki/Heterophile_antibody_test

    If stronger with the sera adsorbed with guinea-pig kidney, the test is positive. If stronger with the sera adsorbed with ox red cell stroma, the test is negative. If agglutination is absent in both mixtures, the test is negative. A known 'positive' and 'negative' control serum is tested with each batch of test sera. [citation needed]

  7. Wells curve - Wikipedia

    en.wikipedia.org/wiki/Wells_curve

    The Wells curve demonstrates that respiratory droplets rapidly dry out or fall to the ground after being exhaled. The Wells curve (or Wells evaporation falling curve of droplets) is a diagram, developed by W. F. Wells in 1934, which describes what is expected to happen to small droplets once they have been exhaled into air. [1]

  8. You can still be contagious with COVID if you have a negative ...

    www.aol.com/news/still-contagious-covid-negative...

    When a positive rapid antigen test goes from a dark line to a very faint line, this means that the virus load in the swab is probably less than when then line was dark, he adds. “So even a faint ...

  9. Pervaporation - Wikipedia

    en.wikipedia.org/wiki/Pervaporation

    The term pervaporation is a portmanteau of the two steps of the process: (a) permeation through the membrane by the permeate, then (b) its evaporation into the vapor phase. . This process is used by a number of industries for several different processes, including purification and analysis, due to its simplicity and in-line natu