Answer:
The positive control is an experiment that involves the repetition of the testusing working treatment. ... This helps the analyst compare the result to a new experiment against an already results that are already known. Negative controls are always used during microbiology testing.
Explanation:
Can be changed for the better
There is no clear timeline on how long it may take for this to occur - while one study suggests that after exposure to the bacteria, it can take a few weeks for PID to develop, the NHS estimates that 1 in 10 women with untreated chlamydia could go on to develop PID within a year.
