Find the sentence with Passive Voice, write what tense it is, and transform it into Active Voice. Coronavirus has become a serious problem for people all over the world. It appeared in China and quickly spread to other countries. This disease is similar to the flu. Symptoms of coronavirus are coughing and fever. Young people usually experience a mild form of the disease. However, coronavirus is a serious danger for the elderly and people suffering from diabetes. Various measures are being taken to prevent the spread of coronavirus: mass events are being canceled, many employees work from home, and many schoolchildren switch to distant learning. A lot of people are quarantined. Some countries even temporarily closed their borders. Unfortunately, measures against the coronavirus cause great harm to the world economy. Many companies suffer heavy losses and may even go bankrupt. This will inevitably affect the income of the population. Of course, it is difficult to calculate all the consequences. For now, we can only follow the situation and wash our hands more often.