The phrase "a vast host" is correct and usable in written English.
It can be used to describe a large number of people or things, often in a literary or poetic context.
Example: "The night sky was filled with a vast host of stars, twinkling like diamonds against the darkness."
Alternatives: "a great multitude" or "a large crowd".
Late in 405 Italy was menaced by new invaders, a vast host of Germans, mainly Ostrogoths, led by a pagan called Radagaisus.
They largely spread their money around a vast host of investments and ventures.
In fact, in addition to this study, a vast host of relative studies show that students are not naturally ready for e-learning.
A survey of the incorporation of IT into education in any academic database will reveal a vast host of papers covering nearly all fields of study.
As a matter of fact, college students' obsession with smart phones have aroused so many educators' concern that a casual survey of any comprehensive database will show a vast host of papers on this topic.
Oddly, while all colleges that accept federal student aid money must abide by a vast host of regulations, the Supreme Court ruled in Rendell-Baker v. Kohn that acceptance of such money does not bring them under the umbrella of the First Amendment.
The mechanisms by which MYC elicits the vast host of biological responses for which it appears to be responsible are not yet fully understood.
It is not surprising to find nicotianae on other crops, since it is able to colonize and reproduce on various herbaceous hosts within the vast host range of M. persicae s.l.l
His aura earned him vast hosts of fans and the role of high priest and soothsayer that he always believed was his birthright.
Density-dependent transmission (Dietz 1988; McCallum et al. 2001) has been shown to be responsible for pathogen dynamics in a vast range of host species (see for example, Burdon and Chilvers 1982; Jaffee et al. 1992; Ebert et al. 2000; Hochachka and Dhondt 2000).
We strolled past luxury watch shops, a casino, and the Höhematte, a vast green that hosts yodelling and Swiss wrestling events.
