LOOKING FOR PAST TENSE

1. Who discovered the corona virus?
2. How many SARS-CoV-2 viruses have infected the country?
3. How many people have been infected and died in Italy?
4. When was corona blue discovered?
5. What age patients have been hospitalized due to the pneumonia virus?
6. When did the man die?
7. When the virus has been revealed?
8. What is the death rate of being infected worldwide?
9. How many people have been cured?
10. Since fired, what did Khalid do?