Complete the text with the passive forms of the Present Simple or Past Simple.
Infections caused by bacteria and viruses _____ (treat) differently. People with bacterial infections
____ (give) antibiotics. The firts antibiotic, penicillin, ___ (discover) by Alexander Fleming in 1929 but it ____ (not use) untill the early 1940s. During the Second World War penicillin ______ (produce) on an enormous scale to treat wounded soldiers. Infections caused by virused ___ (not treat) with antibiotics. The patient ____ (tell) to drink a lot, stay at home and take painkillers to bring down the temperature. The cure _____ (leave) to the patient's own immune system. We can avoid some viral disases, such as measles or mumps, if we ____ (vaccinate). Before we travel to foreign countries we ____ (give) vaccinations to protect us from diseases, such as cholera.
are treat
are give
was discovered
wasn't used
was produced
wasn't treated
is tells
is leaves
were vaccinated
were gave