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These findings coincide with results from other studies of recovered patients, and are the main reason that scientists aren't concerned by the occasional reports of people recovering from COVID-19, testing negative for the virus via a nasal swab PCR test that detects the viral genome, and then testing positive again within a few weeks. These people aren't reinfected, tenOever said. Their antibody levels are high and their immune system is armed against further attack. Instead, the PCR tests are simply picking up bits of inert viral genetic debris left over from the previous infection. gambar tyrannosaurus rex Urine samples taken from the treated patients also showed “shedding” from the virus, meaning once the infected cancer cells died, the replicated virus continued attacking cancerous cells. gambar tyrannosaurus rex for the first couple to produce a son. The actual prize, however, is being kept under wraps. gambar tyrannosaurus rex When a virus attacks its first cell in the body, that cell has two jobs to do before it dies, said Benjamin tenOever, a professor of biology at the Mount Sinai Icahn School of Medicine. The infected cell needs to issue a call for reinforcements, sending out a cascade of chemical signals that will activate an army of immune cells to come battle the invading virus. And it needs to issue a warning to other cells around it to fortify themselves, something it does by releasing proteins called interferons. When interferons land on neighboring cells, they trigger those cells to enter defensive mode. The cells slow down their metabolism, stop the transport of proteins and other molecules around their interiors, and slow down transcription, the process by which genetic instructions become proteins and other molecules. (Transcription is the process that viruses hijack to make more of themselves.)In a studyaccepted to the journal Cell gambar tyrannosaurus rex

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