Read the paragraph below. What main point does the author make in the last two sentences? Antibiotics are medicines that treat infections caused by bacteria. Antibiotics have saved many lives since their invention in the 1920s. For example, hundreds of people in the U. S. used to die of tuberculosis every year. Now, such a death is very rare in this country. However, today many antibiotics don’t work as well as they used to work. Some people use antibiotics when they should not—they take them for a cold or virus, which antibiotics can’t cure. Other people don’t finish their medicine. They just stop taking it when they feel better. In both of these cases, bacteria can become resistant to the antibiotic—it no longer works against them. Once a type of bacteria becomes resistant to an antibiotic, patients with that kind of infection must use more powerful and expensive treatments. It’s important for everyone to use antibiotics correctly, so that we still have effective medicines against disease. Don’t push your doctor for antibiotics, and if you are prescribed some, take them all, exactly as you’re instructed.

1. That antibiotics no longer work well.
2. Take all of the antibiotics you’re prescribed.
3. That everyone should use antibiotics correctly.
4. Don’t push your doctor for antibiotics.