The loss of 600m people was likely due to numerous outbreals in other cities, that and people submitting to zombification, due to your brilliant campaign. That, and more accurate numbers made it look like many people had died.
Many of your research facilities are currently occupied by human forces, and of the ones that are not, they have not been progression into that branch of warefare. However, you order your scientists to begin researching if blood sucking insects can be zombified, or if they would have to do something else. Another issue is that most blood sucking insects have been killed by swarms of NanoExterminators, and batches of them would take a while to aqquire.
The Tenticalians are currently spread on various embassies. Each continent, with a sub government ruled by the major, has been in contact with the aliens. Many Tenticalians have already been zombified on this continent, though many on this continent have flown away, and many of them shot down by our defence sattelites.
The "Glass Zoxin" method has been talked of before, though it is beleived that it would not work - the Zoxin would have to go in through open wounds. The glass box may not wound that many people with shards of flying glass, not enough for a proper outbreak.
And how would these Zoxin Bombs work, exactly?