To help researchers conclude that result are related to the new drug and not to the orange juice, is the best explanation of why a second control group was included in this experiment.
What is common cold and how it get controlled?
- The common cold is a viral infection of your nose and throat (upper respiratory tract). It's usually harmless, although it might not feel that way. Many types of viruses can cause a common cold.
- Healthy adults can expect to have two or three colds each year. Infants and young children may have even more frequent colds.
- Wash your hands after coughing, sneezing, or blowing your nose. Disinfect frequently touched surfaces and objects, such as toys, doorknobs, and mobile devices are some measure to control it.
To help researchers conclude that result are related to the new drug and not to the orange juice, is the best explanation of why a second control group was included in this experiment.
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