Not clear question type again
Answer:
A variety of peroxide compounds, including carbamide peroxide, hydrogen peroxide, sodium perborate and calcium peroxide, have been used as active ingredients for bleaching materials
Explanation:
Active immunity
Active immunity is when something triggers an immunity system to produce antibodies, this something being a vaccine. Hope this helps!
The shingles virus is a reactivation of the chicken pox virus.
True, a bit more than a “small” percentage haha... overall true though.
