Are the confirmatory tests for COVID-19 positive able to see/show the corona virus through the microscope from the specimen collected? If Corona virus is not found and isolated, how the vaccines will be produced ?
You can use electron microscopy to see isolated viruses. People have done that for COVID. It's easy to Google.
For a diagnostic test it's too awkward. They don't keep electron microscopes at the city hospital. There's too much other clutter floating around in the body. You would have hard time finding it. It would be between very difficult and impossible to tell it apart from another coronavirus. PCR testing is easier.
No. Microscopy does not detect virus. For COVID 19, PCR is conducted to identify it.
You can go for expensive and time consuming TEM
https://www.youtube.com/watch?v=I-Tt8L-kmbQ
It is possible to see by gross visual exam of a drop of dried blood and if the drop is smooth and homogenous like normal people there is little likelihood of the person having the virus if it has had the time to affect their immune system and cytokines. If they are infected the surface of the drop of blood will have small irregular holes where the red cells have pulled together in clumps. If you do this on a dozen or so people that are normal you will learn what the norm is and when you hold the dried blood slide up to the light the person with a problem will show these holes. Unfortunately these appear in cancer, autoimmune etc so it is not specific by any means.