âThe Americans continues be one of the best shows on television,â Eric Schrier, President of Original Programming for FX Networks, said in a statement.
A attenuated vaccine is a vaccine created by reducing the virulence of a pathogen, but still keeping it viable (or live). Attenuation takes an infectious agent and alters it so that it becomes harmless or less virulent. These vaccines contrast to those produced by killing the virus (inactivated vaccine).xamples of live (example attenuated) vaccines include: 1  Viral: measles vaccine, mumps vaccine, rubella vaccine, Live attenuated influenza vaccine (the seasonal flu nasal spray and the 2009 H1N1 flu nasal spray), chicken pox vaccine, oral polio vaccine (Sabin), rotavirus vaccine, and yellow fever vaccine.
Flu vaccines are routinely available for seasonal influenza, but these vaccines are not likely to be protective against flu caused by the H1N1 (formerly termed swine flu) virus. There is a separate vaccine against the H1N1 flu.There are two types of seasonal flu vaccines, the injection (with killed virus) and nasal spray vaccines (containing live but weakened virus). The vaccine is generally effective against the influenza virus within two weeks of administration.he vaccine is termed an attenuated vaccine because the viruses are weakened so that they do not cause severe flu symptoms. The nasal spray flu vaccine (LAIV) has been approved by the FDA for use in nonpregnant healthy people between two and 49 years of age.