In 2016 the CDC recommended that LAIV not be used for the 2016-2017 flu season and instead another type of influenza vaccine be used. This is due to the poor effectiveness of this type of vaccine between 2013 and 2016 with it being non effective during the 2015-2016 season.
A determiner is a word that modifies a noun or a noun phrase. Thatâs also the definition of adjective, but although both parts of speech modify nouns, determiners are distinct from adjectives in several respects, most obviously in that the latter express attributes, whereas determiners express relationship.
That is, a determiner may indicate whether the noun is referring to a definite or indefinite element of a class, to a closer or more distant element, to an element belonging to a specified person or thing, to a particular number or quantity, etc.-bar theory contends that every noun has a corresponding determiner (or specifier). In a case where a noun does not have an explicit determiner (as in physics uses mathematics), X-bar theory hypothesizes the presence of a zero article, or zero determiner.