Transmission-based precautions are followed a. when a patient is known to have a particular infectious disease. b. with every patient to protect against possible infectious agents. c. to identify diseases that can be transmitted. d. to track the passing of an infectious disease.

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