Factors that determine the way a receptor will respond to a drug

Describe three ways in which technology has treat the flu

The virus genome and viral proteins are assembled into virions (virus particles) during ) the lytic cycle and the lysogenic cycle in all known host organismsb) the lysogenic cycle onlyc) the lytic cycle onlyd) the lytic cycle in all host organisms but the lysogenic cycle only in bacteria

What does the fitt formula stand for ?