Human guinea pigs

Have you ever taken one of these?  How safe do you think they are?

Aim:
1) Describe how medicines and vaccines are tested.  [CLICK HERE if you need help]
2) Compare the different types of clinical trial - including ‘open-label’, ‘blind’ and ‘double-blind’ human trials. [CLICK HERE if you need help]
3) Complete THIS TEST and record the correct answers into your book.