During the plague of the 5th trumpet when horse-sized armor-plated locusts swarm out of the Earth it's said that they won't hurt those who have the seal of God on their foreheads.
5/7 Seal of God
The Last Trump is AFTER the First Six
There will be seven trumpets which initiate the plagues of the tribulation. Six of them will have sounded before the seventh and final trumpet sounds.
November 8th
The fifth trumpet/vial involves an army of horse-sized armor-plated locusts which are probably at least as terrifying as the Xenomorphs in the Alien franchise.