If H3N2 viruses continue to circulate prominently, the 2014-2015 influenza season could be severe. In addition, most of the H3N2 viruses that have been antigenically or genetically characterized at CDC are different or drifted from the H3N2 vaccine virus.
Updated April 12, 2017. An indefinite pronoun is a pronoun that refers to an unspecified or unidentified person or thing. Put another way, an indefinite pronoun doesn't have an antecedent.
Usage Discussion of THEIR. They used as an indefinite subject (sense 2) is sometimes objected to on the grounds that it does not have an antecedent. Not every pronoun requires an antecedent, however.The indefinite they is used in all varieties of contexts and is standard.They, their, them, themselves: English lacks a common-gender third person singular pronoun that can be used to refer to indefinite pronouns (as everyone, anyone, someone). Writers and speakers have supplied this lack by using the plural pronouns.sage Discussion of THEIR. They used as an indefinite subject (sense 2) is sometimes objected to on the grounds that it does not have an antecedent. Not every pronoun requires an antecedent, however.