If you are poor, you have no doubt the probability of infection and illness is much greater, but also more vulnerable to AIDS because deaths.

如果你是穷人，毫无疑问你感染和患病的几率要大得多，也更容易因为艾滋病而死亡。

youdao

Answer: the needle through the blood of HIV infection risk is 50%, through mother to child transmission probability is 30%.

答：通过带血的针头感染艾滋病的几率是50%，通过母婴传播的几率是30%。

youdao

If there are sets of probability of HIV infection, transmission probability of only 10 one ten thousandth!

如果有套感染艾滋病几率，传播概率就只有10万分之一！

youdao

Ventilation dilutes the concentration of infectious particles within any confined space, thereby reducing the probability of infection.

CNN: Commentary: Flu and your health on a plane

The probability of actually catching the flu or a bacterial infection as a result of cell phone contact is actually dependent on a number of factors how long the viruses or bacteria have been on the phone surface.

FORBES: Can Your Smartphone Spread The Flu?