The outbreak of the deadly virus namely nipah virus has been first discovered in Malaysia in 1988. The later outbreaks were recorded in Bangladesh and India. The natural host of this virus is found to be fruit bats. From the fruit bats the virus gets transferred to fruits and vegetables and animals also. Mainly pigs are the ones which easily get infected due to the virus. The fatality rate is very high due to this virus. No vaccine has been yet developed which can cure human infection. In this article the development of nipah virus from 1998 to 2018 is studied and current developments, preventive measures have been studied in order to prevent the future outbreaks.

The outbreak of zika virus belonging to the flavivirus genus was first reported in 1947 in the monkey species in Uganda. Then it was first isolated from the Aedes mosquito’s species. Recent outbreaks have been reported in India also. The main host of the virus is humans like all other flaviviruses. Although the fatality rate is not so high but the effects are seen majorly on the fetus when pregnant women gets infected. No perfect treatment or vaccine has been developed yet to treat the disease. In India also few cases are now being reported and it shows that the outbreak of the virus is just not limited to Brazil and America but now also to Asian countries as well and gradually worldwide its infection will spread through. This article deals with the development of the zika virus from 1947 to 2018 and the preventive measures in order to prevent future outbreaks have been considered.