VOICED: Tick saliva could hold cancer cure: Brazilian scientists

Scientists in Sao Paulo discovered a protein in tick saliva that may cure cancer. Lab tests on rats showed tumors shrank and disappeared after 42 days without harming normal cells. The Butantan Institute is applying for a patent, but developing a medicine will take years and require collaboration with international drug companies.

What was the initial discovery made by scientists in Sao Paulo regarding tick saliva?

• It contains a protein that prevents blood clotting.

• It is harmful to human skin.

• It can be used as a food preservative.

• It can cure all types of diseases.

What was the outcome of applying the protein to rats in lab tests?

• The rats' normal cells were damaged.

• The tumors shrank and eventually disappeared.

• The protein had no effect on the tumors.

• The rats developed new tumors.

How did the protein affect normal cells during the tests?

• It caused them to multiply rapidly.

• It made them shrink.

• It turned them into tumor cells.

• It had no harmful effect on them.

What is the next step for the Butantan Institute after discovering the protein?

• To distribute the protein freely to the public.

• To immediately start selling the protein as a medicine.

• To apply for a patent and conduct further research.

• To abandon the research due to lack of interest.

What is required to develop the protein into a medicine?

• Immediate mass production.

• Approval from local authorities only.

• Years of clinical trials and international collaboration.

• A simple change in its chemical structure.