Citat:
De får skador på lungor i samma omfattning som människor. Det är därför man fokuserar på lungskador vid djurförsök.Inte visste jag att apor inte blir så sjuka i COVID19 vilket ställer till det när man använder dem som försöksdjur. Hursomhelst, en intressant artikel med synpunkter på vaccinutvecklingen. Tydligen har man problem med att få immunsvar i de övre luftvägarna bl.a.:
The Risks of Rushing a COVID-19 Vaccine
Telescoping testing time lines and approvals may expose all of us to unnecessary dangers
Det är nog en smartare väg att gå då de icke-farmakologiska åtgärderna redan finns tillgängliga s.a.s. Jag tror också att chansen är stor att SARS-CoV-2 till slut muterar och blir mindre farligt och slutligen inrangerar sig bland de fyra andra coronavirus vi har som inte besvärar oss mer än med vanlig förkylning av mildare slag.
The Risks of Rushing a COVID-19 Vaccine
Telescoping testing time lines and approvals may expose all of us to unnecessary dangers
/.../Questions also arise around the efficacy of a potential vaccine. The little we know of the current generation of COVID-19 vaccines raises serious questions regarding their ability to protect people from infection. We know all the candidates tested to date in non-human primates failed to protect any of the monkeys from infection of the nasal passages, the primary route of human infection. Failure to protect entirely from infection fits with all we know about attempts to protect monkeys from two other deadly coronaviruses, those that cause SARS and MERS.Det finns även alternativ till vaccin för att hindra spridning och dämpa konsekvenserna av viruset:
On a brighter note, at least some of the candidate vaccines did raise significant immune responses. How that translates to protection of humans is uncertain though as monkeys do not become noticeably ill or exhibit many of the life-threatening consequences of COVID-19, even when exposed to high doses of the virus via the nose, lung, and rectum simultaneously. As many of the most serious COVID symptoms do not appear until late in the disease course, sometimes four to five weeks following exposure, there is a possibility that we will not have sufficient time to judge efficacy of a new vaccine, even by the lower standard of symptom amelioration.
Yes, we are all increasingly longing for an end to the outbreak. But a safe vaccine, effective for all those at risk, is worth the wait, especially when we have other solutions in hand. We already know from the experience of countries in Asia that the epidemic can be stopped in its tracks with basic public health measures: widespread testing, contact tracing, and mandatory controlled quarantine—not necessarily in a dismal public health facility as many imagine, but in our own homes with virtual supervision or in a hotel environment. These efforts alone could bring new infections down to almost zero within just weeks.https://www.scientificamerican.com/article/the-risks-of-rushing-a-covid-19-vaccine/
In addition, I believe it will be possible before the end of this year to protect those most at risk from exposure with combinations of monoclonal antibodies or with truly effective antiviral drugs. These drugs could treat those who were ill and prevent further infection. In addition to pursuing a vaccine within a realistic timeframe, we should also be throwing our weight behind these other types of medical solutions which have historically been much quicker to bring to market safely.
Det är nog en smartare väg att gå då de icke-farmakologiska åtgärderna redan finns tillgängliga s.a.s. Jag tror också att chansen är stor att SARS-CoV-2 till slut muterar och blir mindre farligt och slutligen inrangerar sig bland de fyra andra coronavirus vi har som inte besvärar oss mer än med vanlig förkylning av mildare slag.
Notera också att det är inte vid alla försök som man öht mäter virushalten i t.ex. näsan.