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.
Definite Article and Indefinite Article. a/an, the. The determiners a/an and the are called articles. They are the most common of all determiners. They come at the very beginning of a noun phrase. We divide them into indefinite and definite like this: We use indefinite to mean non-specific. Indefinite is general. We use definite to mean specific. Definite is particular. When we are talking about something in general, we use a or an. When we are talking about something in particular, we use the.