Boris Johnson visiting a coronavirus testing lab in Glasgow

The video tutorial introduces the concept of 'blast' and discusses its setup. It covers sales strategies and the use of Flask in business contexts. The tutorial explores supply side skills and classifications, introduces the concepts of virus and spring grass, and concludes with final thoughts.

What does the phrase 'skills up to I think we go through four classifieds' suggest about the skills required?

In what context is the term 'virus' used in the text, and what might it refer to?