If an ad costs $4,000 in a newspaper with a circulation of 100,000, your cost to reach 1,000 readers is $40, since 100,000 / 1,000 = 100 and $4,000 / 100 = $40. If a radio ad costs $250 and the station has 50,000 listeners, the CPM for that ad is $5.
You have probably heard of pneumonia, which is an infection of the lungs. Pneumonia can be caused by many different bacteria, viruses, and even fungi. Pneumococcus is one of the most common causes of severe pneumonia. Besides pneumonia, pneumococcus can cause other types of infections too, such as: Ear infections. Sinus infections.
Other Microbes. In addition to viruses and bacteria, there are three other major types of microbes that can cause infectious diseaseâand one newly discovered type. As with viruses and bacteria, not all of the species in each of these categories are infectious to humans. But many of the worldâs most prevalent infectious diseases are caused by microbes that are included in the groupings below.