Oil of rosemary does not just repel ticks; it also deters flies, aphids and mites. While oil of rosemary is a tick repellent, it is not the most effective one available. Rose geranium and palmarosa essential oils repel ticks better.
Confidence votes 61. Viruses attach to living cells by binding to the cell receptors. The receptor site is very much like a jig-saw puzzle and the virus must be shaped to fit the site and to lock in. The virus first sticks to the cell membrane of the host cell. The virus then inserts its DNA/RNA into the cell's cytoplasm.
The gp 120 proteins attach to CD4+ receptors of T lymphocytes; HIV enters the cell and makes viral DNA; the enslaved host cell produces new viruses that bud, which destroy the host cell's membrane, causing cellular death and allowing the virus to leave to attack other CD4+ lymphocyte cells.