nybody still believe Democrats are not trying to extend the shutdown and keep businesses closed to keep the economy down and harm Trump’s re-election chances?
.Smithsonian Magazine posted a great informative piece about a month ago that explains clearly how we get immunity from viruses. Some excerpts are presented below:
“What Scientists Know About Immunity to the Novel Coronavirus.” By Katherine J. Wu, www.smithsonianmag.com. March 30, 2020
Resolving the COVID-19 pandemic quickly hinges on a crucial factor: how well a person’s immune system remembers SARS-CoV-2, the virus behind the disease, after an infection has resolved and the patient is back in good health. This phenomenon, called immune memory, helps our bodies avoid reinfection by a bug we’ve had before and influences the potency of life-saving treatments and vaccines. By starving pathogens of hosts to infect, immune individuals cut off the chain of transmission, bolstering the health of the entire population.
Scientists don’t yet have definitive answers about SARS-CoV-2 immunity. For now, people who have had the disease appear unlikely to get it again, at least within the bounds of the current outbreak. Small, early studies in animals suggest immune molecules may stick around for weeks (at least) after an initial exposure. Because researchers have only known about the virus for a few months, however, they can’t yet confidently forecast how long immune defenses against SARS-CoV-2 will last.
‘We are so early in this disease right now,” says C. Brandon Ogbunu, a computational epidemiologist at Brown University. “In many respects, we have no idea, and we won’t until we get a longitudinal look.’.When a pathogen breaches the body’s barriers, the immune system will churn out a variety of immune molecules to fight it off. One subset of these molecules, called antibodies, recognizes specific features of the bug in question and mounts repeated attacks until the invader is purged from the body. (Antibodies can also be a way for clinicians to tell if a patient has been recently infected with a given pathogen, even when the microbe itself can no longer be detected.) Though the army of antibodies dwindles after a disease has resolved, the immune system can whip up a new batch if it sees the same pathogen again, often quashing the new infection before it has the opportunity to cause severe symptoms. Vaccines safely simulate this process by exposing the body to a harmless version or piece of a germ, teaching the immune system to identify the invader without the need to endure a potentially grueling disease.
From the immune system’s perspective, some pathogens are unforgettable. One brush with the viruses that cause chickenpox or polio, for instance, is usually enough to protect a person for life. Other microbes, however, leave less of an impression, and researchers still aren’t entirely sure why. This applies to the four coronaviruses known to cause a subset of common cold cases, says Rachel Graham, an epidemiologist and coronavirus expert at the University of North Carolina at Chapel Hill. Immunity against these viruses seems to wane in a matter of months or a couple of years, which is why people get colds so frequently. Because SARS-CoV-2 was only discovered recently, scientists don’t yet know how the human immune system will treat this new virus. Reports have surfaced in recent weeks of people who have tested positive for the virus after apparently recovering from COVID-19, fueling some suspicion that their first exposure wasn’t enough to protect them from a second bout of disease.
Most experts don’t think these test results represent reinfections. Rather, the virus may have never left the patients’ bodies, temporarily dipping below detectable levels and allowing symptoms to abate before surging upward again. Tests are also imperfect, and can incorrectly indicate the virus’ presence or absence at different points. Because the COVID-19 outbreak is still underway, ‘if you’ve already had this strain and you’re re-exposed, you would likely be protected,’ says Taia Wang, an immunologist and virologist at Stanford University and the Chan Zuckerberg Biohub. Even antibodies against the most forgettable coronaviruses tend to stick around for at least that long.
COVID-19 packs a stronger punch than the common cold, so antibodies capable of fending off this new coronavirus may have a shot at lingering longer. Broadly speaking, the more severe the disease, the more resources the body will dedicate to memorizing that pathogen’s features, and the stronger and longer lasting the immune response will be, says Allison Roder, a virologist at New York University. Previous studies have shown that people who survived SARS, another coronavirus disease that resulted in a 2003 epidemic, still have antibodies against the pathogen in their blood years after recovery. But this trend is not a sure thing.
.But the mere presence of antibodies doesn’t guarantee protection, Wang says. Reinfections with common cold coronaviruses can still happen in patients who carry antibodies against them. And a bevy of other factors, including a person’s age and genetics, can drastically alter the course of an immune response.”
.My hypothesis on this virus is, we should NOT be hiding from it behind masks and shutdowns. If a person is not immune compromised and has no comorbidities, they are extremely likely to recover from it and be immune from it in the future.
Be not afraid.