How are up to 80% of viruses transmitted?

We look after touch points in cleaning routines and we take care of our hands with soaps and sanitisers. But are we focusing on the real danger?
Sources of data:
www.ncbi.nlm.nih.gov/pmc/arti...
www.ncbi.nlm.nih.gov/books/NB...
www.pnas.org/doi/10.1073/pnas...
inivos.com/blog/vectors-of-tr...