I had a dream last night set in the future. It was a future in which the alien presence was openly recognized.
There were effects on our society but they were good, a greater tolerance for one another, a more even distribution of wealth. This is the main reason it’s been kept secret. It’s a social change the wealthy elites don’t want.
The aliens traded with us. They had mammoth cargo ships that they would come with for this purpose and there were the problems. It turned out viruses were not a huge problem, our genetic machinery was sufficiently different that it would not decode the alien DNA and generate the proteins their viruses needed. Our problems were more macro pests and two in particular were bad.
One was a very pernicious flea like creature. Like fleas it ate blood and hopped. Unlike fleas it did not spend a lot of time on our bodies, just enough time to suck blood and leave. But doing so they spread blood born illnesses rather efficiently and their numbers were huge. They made the worst infestation your dog has ever seen look trivial. They were highly insensitive to any Earth pesticides and apparently the aliens hadn’t done much better but what they were sensitive to is high level UV light, at levels that would give us sunburns. So we would install UV lighting systems in our houses that would come on automatically when we weren’t in the room. That helped but wasn’t 100%.
The other pest was a creature that was kind of a cross between a snake and an crocodile. It had a snake like body, would get up to about eight foot in length, but it had a head that was more like an crocodile that could bite off chunks and enabled it to take on much larger prey than it could swallow whole, including humans. It would grip humans like a boa constrictor and chomp on them until nothing was left. These had to be treated like any large predator except that, not being native to this planet, we had no misgivings about doing our best to bring about their extinction. This was easier said than done however.
For whatever reason in this last week I’ve been having a series of dreams like this. Have not really watched any frightening sci-fi lately so not sure the source.