The infection table

A dictionary holds the eight infections of the NCERT list, with their cause and what the lesson says about their cure and their spread. You will sort and count them.

The idea. A dictionary can be searched with a loop or a list comprehension, and the answers can be counted.

Your tasks.

1. Finish count_by_type. It gives a dictionary with the number of infections of each cause.
2. Finish not_curable. It gives the sorted list of the names of the infections that are not completely curable.
3. Finish needle_spread. It gives how many infections can also spread on shared needles.