Saliva testing also has specific uses in clinical and experimental psychological settings. Because of its insight into human behavior, emotions, and development, it has been used to study psychological phenomena such as anxiety, depression, PTSD, and other behavioral disorders. [11] Its main purpose

There are several conventional sampling methodsa) Nasal swab: gently insert the swab head into the nasal palate in the nasal canal, stay for a moment, and then slowly rotate the line to exit.