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

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

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