What are XE mutants?XE is a mutant resulting from recombination of BA.1 (original Omicron strain) and BA.2 (Omicron "stealth" strain), and is referred to as a "recombinant" or hybrid strain. And a "variant" is a version of a virus that contains a set of mutations, or changes in its genetic material.

Nasal swab collection method: Wet the swab in normal saline. Measure the distance from the nostril to the base of the ear with a swab and mark it with your finger.