Brief Answer:
Detail Follows.

Detailed Answer:
Welcome To HCM. I am Dr Anshul Varshney.
I understand your concern.
First of all this should be kept clear in mind that Ebola Infection can attack any one even people with good immunity. So raising immunity in a normal person by consuming these supplements is a good idea but if we talk practically is not a way to prevent infection from Ebola.
Definitely people with low immunity like Diabetics, Cancer patients, People living with HIV are more prone to catch any infection including Ebola.
If you want you can continue these supplements as per your belief. But no supplement can prevent infection if you have caught one.
There is no harm in taking these supplements because they won't harm you.
And my sincere opinion is to stop worrying. You know that worrying and stress reduces the efficacy of immune system!!!
Do whatever you can do to prevent yourself from Infection like covering mouth while you are out, keeping a distance from people while talking, avoid shaking hands.
Simply adopt simple measures. And stop worrying excessively.
Build a trust in yourself that at least you won't get the Ebola.
Trust your immune system.
If you have any further query please ask me.
Stay Healthy.

---

Brief Answer:
Detail Follows

Detailed Answer:
Yes that is true. Boosting your immune system will atleast help somehow in reducing the severity of the disease.
See this is a new disease we all are encountering. So there are no definitive immune system boosters known.
In general you can try ginger , turmeric, fish oil and Vitamin C supplements.
I hope I am of help to you.
If you have any further query please ask me else you may close the discussion and Rate it.
Stay Healthy.

---