quarantine – n. to put someone with a contagious disease alone until the disease ends

pandemic – n. the movement of a contagious disease across country lines

confidence – n. to be certain or sure of one's ability

globally -adj. worldwide

accurate – adj. to be correct in the small details

QR code – n. a quick-response code is a matrix on a computer-readable machine

eager – adj. to want to do something

certify – v. to say that something is legal and true

negative – adj. on the bad side