Scenario Possible risks
Actions that promote
their duty of care /
protect the service
user
Colleen works for a
domiciliary care
agency.
She is
visiting Hazel, who
has infected leg
ulcers. Before
starting work,
Colleen washes her
hands and puts on an
apron and gloves.
After she has
assisted Hazel,
Colleen removes her
apron and gloves.
Once these have been
disposed of, she
washes her hands and
applies an
alcohol-based hand
rub.

Viruses use the host's machinery to make copies of themselves. however, some human viruses require a type of replication that humans do not normally have. for example, humans normally do not have the ability to convert rna into dna. how can these types of viruses infect humans, when human cells cannot perform a particular role that the virus requires? a) the virus causes mutations in the human cells, resulting in the formation of new enzymes that are capable of performing these roles.b) the viral genome codes for specialized enzymes not in the host.c) the virus infects only those cells and species that can perform all the replication roles necessary.d) viruses can stay in a quiescent state until the host cell evolves this ability.