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Vaccines developed using proteins rather than live viruses can help protect animals and subsequently humans from insect-borne viruses, according to Alan Young, chief scientific officer for Medgene Labs, an animal health company that develops therapeutics and diagnostics, including vaccines.

A regime of anti-HIV drugs -- components of regimens to treat established HIV infection -- has the potential to protect against infection in the first place. But real life can interfere; the effectiveness of this prophylactic approach declines if the medications aren't taken as prescribed.