To determine the correct air/fuel mixture and the correct ignition timing, the PCM must know the atmospheric (BARO) pressure. If the PCM is to compensate for changes in altitude or weather, it must have an input signal that reflects these changes in atmospheric pressure.
As of 2009, XDR TB has not appeared in Indonesia, but it still remains a huge threat.i The fact that HIV positive individuals are more susceptible to TB infection is another difficult obstacle in containment. In fact, more than 50% of individuals living with HIV die from TB infection.
Prevention of TB involves both early treatment to reduce transmission and isolation of the infected person until they are no longer contagious. There is a vaccine against TB, but it is not used routinely in the U.S. because of efficacy issues and other problems.