Darius notices a small, painless red pimple on his skin that eventually becomes a chancre. the chancre disappears, and he develops a rash with fever and headaches.

Increased use of cocaine can reduce the period of stimulation. true or false

Will treating a viral infection with antibiotics affect the course of the infection? a) no; antibiotics work by inhibiting enzymes specific to bacteria. antibiotics have no effect on eukaryotic or virally encoded enzymes.b) no; antibiotics do not kill viruses because viruses do not have dna or rna.c) yes; antibiotics activate the immune system, and this decreases the severity of the infection. d) yes; antibiotics can prevent viral entry into the cell by binding to host-receptor proteins.

How do i know when i have a stress headache? what are the symptoms?