Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
40% of the mosquitos in Jack's area are infected with malaria. 20% of the mosquitos are infected with Zika virus. Without a vaccine, the chances of getting infected with either virus after getting bitten by an infected mosquito are 50%. Jack is taking an experimental malaria vaccine that reduces the chances of getting infected after getting bitten by 50%. If Jack gets bitten by a random mosquito, what is the percentage chance he catches either Zika virus or malaria?

### Response:
 Kwanza tafuta nafasi ya Jack ya kuumwa na mbu aliyeambukizwa: 40% + 20% = 60%
Nafasi ya kuugua baada ya kuumwa na mbu aliyeambukizwa: 60% * 50% = 30%
Nafasi ya kuugua baada ya kupokea chanjo: 30% * 50% = 15%