Some of the more persistent wildlife and animals that visit gardens includes raccoons, deer, moles, rabbits, cats and dogs. One of the best ways to keep wildlife and other animals out of the area is to place plants the animals dislike around the outside of the garden or landscaping.
Home Â» Biology Â» Antigenic shift Antigenic shift Antigenic shift is the process by which two different strains of influenza combine to form a new subtype having a mixture of the surface antigens of the two original strains. Because the human immune system has difficulty recognizing the new influenza strain, it may be highly dangerous.
The influenza virus changes often, so having flu caused by one strain does not give you full immunity to other strains. Widespread outbreaks of the flu usually follow significant changes (called antigenic shifts) in the virus and occur about every 10 years. People who get the flu tend to become much sicker when a shift in the flu virus occurs.