Answer:
The correct answer is option A. an immediate immune reaction to the initial infection with dengue virus.
Explanation:
The dengue is the virus infected disease that is caused by dengue virus and transmitted by the aedes mosquito. The dengue fever and dengue hemorrhagic fever are two type of dengue. DHF or dengue hemorrhagic fever includes second stage of the fever with plasma leakage from endothelium of blood vessels.
Thus, the correct answer is option A. an immediate immune reaction to the initial infection with dengue virus.
Answer:
Neither observer nor subjects know which subject receives the vaccine and which receives a placebo
Explanation:
In a double-blind study neither the participants nor the experimenters is aware of who is receiving a particular treatment.
Its used to prevent bias in research results from demand characteristics or the placebo effect
I believe this is the cell wall
<span>The correct answer is Pheromone. This isn't only common to moths, but mostly to all animals. Animals release pheromones to attract each other and procreate to ensure that the species continues existing. Sugars and hormones are completely different things and are unrelated to sexual attraction in animals.</span>
