What is the difference between flocked swabs and ordinary cotton swabs?

Material:
Flocked swabs: nylon fiber flocking head + plastic/wooden rod
Ordinary cotton swabs: absorbent cotton head + wooden rod
Uses:
Flocked swabs: virus/DNA sampling, accurate diagnosis
Ordinary cotton swabs: ordinary disinfection, wound care
Advantages:
Flocked swabs: no fiber residue, high sample recovery rate
Ordinary cotton swabs: economical and versatile