Biology Revision for "O" level examinations

What is Zika? Zika virus is a member of the Flaviviridae virus family and the Flavivirus genus, transmitted by daytime-active Aedes mosquitoes, such as  A. aegypti. How does the virus spread? Aedes aegipti Mosquito Zika virus is transmitted to people primarily through the bite of an infected Aedes species mosquito. These are the same mosquitoes that spread dengue and chikungunya viruses. These mosquitoes typically lay eggs in and near standing water in things like buckets, bowls, animal dishes, flower pots and vases.  They are aggressive daytime biters, prefer to bite people, and live indoors and outdoors near people. Mosquitoes become infected when they feed on a person already infected with the virus. Infected mosquitoes can then spread the virus to other people through bites. What are some of the Symptoms of Zika? -About 1 in 5 people infected with Zika virus become ill (i.e., develop Zika). Symptoms of Zika infection -The most common symp...

What is H1N1 flu? H1N1 is a flu virus. When it was first detected in 2009, it was called “swine flu” because the virus was similar to those found in pigs. The H1N1 or swine  flu  is a respiratory disease caused by  influenza   viruses  that infect the respiratory tract of pigs and result in a barking  cough ,  decreased appetite , nasal secretions, and listless behavior; the virus can be transmitted to humans. The H1N1 virus is currently a seasonal flu virus found in humans. Although it also circulates in pigs,  you cannot get it by eating properly handled and cooked pork or pork products Transmission Swine flu is transmitted from person to person by  inhalation  or ingestion of droplets containing virus from people  sneezing  or  coughing . Symptoms Symptoms of H1N1 Symptoms of swine flu are similar to most influenza infections. Some symptoms are listed below:    Fever (100 0...