Mosquitoes can transmit a variety of diseases, such as malaria, filariasis, Japanese encephalitis, etc. Some people worry that when a mosquito bites an HIV-infected person, the HIV present in the mosquito will be transmitted from person to person when it bites the next person. Researchers point out that such fears are unnecessary. If the following are true, which most supports the researcher's point is:. ['HIV-infected people do not always have high levels of HIV in their bloodstream.', 'Mosquito bites HIV-infected person may not immediately bite the next person.', 'Mosquitoes inhale blood through the esophagus, this blood inhalation is always one-way.', 'Children are susceptible to mosquito bites, but they rarely have HIV infections.']