This medication can cause a serious decrease of a certain type of white blood cells (neutropenia). To make sure you have enough white blood cells, your doctor will order lab tests before starting and while your are taking clozapine. Neutropenia may lower your ability to fight infections.
The Orbital Debris Problem. There are currently over thirteen thousand satellites and other large objects in orbit around the Earth, and there are countless smaller pieces of debris generated by spacecraft explosions and by collisions between satellites.
Old comets breakdown into individual rocks over time (several thousand years). These rocks are clustered together at first as a swarm, then later spread out along the old comet orbit. When the Earth passes through the old orbit it encounters a fraction of the meteors causing a shower or swarm.