Source text:

It used to be only five to ten percent of people developed allergic reactions to antibiotics, mainly penicillin. Now, as more and more individuals are exposed to antibiotics more and more often, increasing number of people are developing allergic reactions to drugs.

Source:

Harris, Malcolm. Pharmaceutical Microbiology. London: Baillière, Tindall and Cox, 1964.

Writer’s text:

In the past, only 5% to 10% of the people are allergic to antibiotics, primarily penicillin. Now, as antibiotics are used more and more often, increasing number of people are developing allergic effects. (McKenna, 1998, p.29)

Writer’s comment:

This one, some of it are paraphrase. …Maybe I should have used a quotation mark here.