The War: Medicine vs. Virus

Nowdays we live quietly, we trusting that medicine will be able to cure or heal almost any disease that enters our lives.
But that is far from the reality. New viruses, new forms of the flu, the zika virus, the ebola virus, the papiloma virus - these things constantly threaten the human race... along with whatever else may appear.
The reality is, vaccines aren't 100% effective in preventing infection.
However, prevention is better than cure. We can always practice good hygiene. Wash our hands, wash the fruits and vegetables.
Taking good care and maintenance of water, livestock and orchards is a very important way to avoid infection.
What do you think? Could the humanity end because of a virus?

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Hi Ana. Recently I was discussing a similar topic with some acquaintances of mine, who are scientists. They told me that even if someone wanted to design a virus that could eliminate mankind, it would be very difficult. The thing is, a virus has to keep its host alive long enough to spread itself, so it can't be too fatal. But at the same time, it would have to be very fatal to be a threat. So, normally there is the situation of a virus which allows people to stay alive for a while, which means it can be treated, or there is a virus which kills people very quickly - meaning it cannot spread.

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