Answer:
In Asia, specifically china.
Explanation:
The issue known as the Black Death killed many in Asia, all type and sorts of disease and virus come from asia to other continents which is how the recent sickness started.
Answer:
The only two disadvantages I know is that the photographs when taking them were incredibly sensitive to movement and so they had to sit still for a long time and had to keep their eyes shut. The other disadvantage was that the person taking the photo could have contracted mercury poisoning.
Explanation: