Low death rate from infectious diseases in modern hospitals are attributable to modern hospitals having isolation facilities, where infectious patients are quarantined, and having better technological equipments used to diagnose and treat infections in its early stages.
Hospitals now have areas that cater to different types of medical conditions. Areas like the intensive care units, labor and birthing rooms, isolated rooms, etc. Unlike hospitals in the early ages where everyone is placed in wards regardless of the extent of their sickness.
Vaccinations are also readily available for everyone which lessens the chances of acquiring infectious diseases and spreading them to unsuspecting people.
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Cnidarians are not considered to have coelm ecause they are diploblastic, so they don't have any mesodermic tissue.
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ma'am we need answers choices
The answer is negative controls. These are groups where no phenomenon is probable. They ensure that there is no effect when there should be no effect. Where there are only two possible outcomes, e.g. positive or negative, if the treatment group and the negative control both produce a negative result, it can be concluded that the treatment had no effect. If the negative control group and the treatment group both yield a positive result, it can be inferred that a puzzling variable is involved in the occurrence under study, and the positive results are not only due to the treatment. In other examples, outcomes might be measured as lengths, times, percentages, and so forth.
