It notes some of the critical scientific questions regarding Zika that deserve further exploration, including: whether certain viral mutations occurred to facilitate its geographical spread; if different species of Aedes mosquitoes are capable of
transmitting Zika and what that may mean for future transmission; what is apparently unique to Zika compared to other more well - known
flaviviruses, such as dengue, that can explain why it can cause congenital infections, neurological conditions and encephalitis,
transmit sexually and persist for long periods of time in multiple parts of the human body; and whether preexisting immunity to other related
flaviviruses may impact Zika exposure and infection.
«Most
flaviviruses are zoonotic,» meaning they can be
transmitted from animals to people, Gao says, «so infection of human beings can not be ruled out.»
Col. Thomas reminds us, «The WRAIR has been studying
flaviviruses for over 100 years, since Walter Reed and his team discovered that yellow fever is
transmitted by mosquitoes.»