Biological kingdom of 'microparasite' that is unable to replicate without hijacking the hosts replication machinery

Vast biological kingdom comprising an enormous diversity of genome archectures which are either a DNA or RNA unit of replication that is either single or double stranded. Moreover, the genome can be segments (such as influenza virus) or single stranded (such as coronavirus). Furthermore, RNA viruses can be postivie or negatively stranded. RNA viruses are notorious for mutating very rapidly.