I don't think so... not yet.
"They" are waiting for the conditions to be perfect (celestially, and terrestrially) in order for the right VECTOR to deliver a catastrophic result.
Exodus pestilence worked, for example (of course, since it was God's will,) and if The Destroyer was upon them then (which I believe so, seeing as other texts that match the bible story ALSO describe a cosmic body visible) then it is understandable how things like the parting of the red Sea happened.
Despite claims of cigar shaped UFOS seen weeks before the Plague, that didn't work as a proper worldwide vector since the world population was not interacting worldly enough.
Polio didn't work, fundamentally.
AIDS didn't work because of a manufacturing error.
Swine Flu was a farce of cosmic magick gone wrong (yes, magick...)
Ebola was a red herring of cosmic magick miscalculated.... all times.
Zika, if their cosmic magick works, could work. But, it isn't a strong enough vector.
The ideal vector would be a fast acting virus capable of mutating, with a kill rate that is high enough to destroy a large portion of the population, but also kill slowly enough to be a serious SPREADABLE CONTAIGEN. Ebola fails at this categorically, because it has a 90%+ kill rate, and is fast acting. This is why conspiracy theories assert the vector will be a hybrid - like weakened rabies and a flu virus. The point is to
1) depopulate
2) sterilize
3) dehumanize
#3 - dehumanization - will come from what will be done to get rid of, or control the contaigen.
Zika is a pestilence, but it was patented sixty years ago, and has a manufacturing error. For starters, you can still procreate with the infection - a big mister in the overall goal (sterility and depopulation). Zika is also NOT a serious infection, and originally did NOT cause microencephaly.
Some people are trying to speed up the coming of the Enemy with these magickal antics with the hopes of stopping further prophecy when the works of their own hands bring their god the Enemy as "christ."