Primary, secondary, and tertiary sources. When searching for information on a topic, it is important to understand the value of primary, secondary, and tertiary sources.Primary sources allow researchers to get as close as possible to original ideas, events, and empirical research as possible.ertiary resources often provide data in a convenient form or provide information with context by which to interpret it. The distinctions between primary, secondary, and tertiary sources can be ambiguous.
As you might think, bacterial infections are caused by bacteria, and viral infections are caused by viruses. Perhaps the most important distinction between bacteria and viruses is that antibiotic drugs usually kill bacteria, but they aren't effective against viruses.
Antibiotics are medicines used to treat infections caused by bacteria. Antibiotics don't work against infections caused by viruses, such as colds and flu.So there's no point taking antibiotics to treat a cold or flu, and no point asking your doctor to prescribe them for a cold or flu.Taking antibiotics when you don't need them, like for a cold or flu, is a waste.ost common infections are caused by viruses. Antibiotics do not work against viruses. Most viral illnesses get better themselves without antibiotics. The table below helps you to know when you're likely to need an antibiotic-and when you aren't.