Greek letters are often used as parts of scientific labels, which adds authority to the idea. The Greek-letter labelling proposed by the WHO is therefore an official attempt to provide the convenience of simple, uncontroversial monikers. ALPHA, BETA, gamma, delta. And, at least to those familiar with the alphabet concerned, the names instantly convey information about what order the variants were discovered in. Currently, there are no plans on how to label the variants after the 24 letters of the Greek alphabet are used up.
Greek letters are used in epidemics.
( z0 use :ARG1 ( z1 letter :mod ( z2 language :name ( z3 name :op "Greek" ) ) ) :ARG2 ( z4 epidemic ) )
(z0 / use-01
    :ARG1 (z1 / letter
              :mod (z2 / language
                       :name (z3 / name
                                 :op1 "Greek")))
    :ARG2 (z4 / epidemic))
Greek letters are used in epidemics .
z2 :name z3
z3 :op1 0
z1 :mod z2
z0 :ARG1 z1
z0 :ARG2 z4