Diseases can be caused by various things. Those can be determined by research into patients, comparing them with healthy individuals and identifying what works and what doesn't. Such research is hard and expensive, but it is only the beginning in the drug discovery process.
mRNA has been used to deliver functioning genetic code into cells that produces specific proteins. Researchers have found new ways to deliver such molecules and induce gene expression that could help or even treat diseases such as cancer.
Monoamine oxidases, have been shown to play a role in oxidative stress in cells. Monoamine oxidases are enzymes used in mitochondrial membranes and exist as two different variants, MAO-A and MAO-B. Those enzymes have been shown to induce oxidative stress in similar ways, similar to those that result in cardiovascular pathophysiology.
Rhodiola rosea is a flowering plant. It grows naturally in the wild Arctic regions of Europe, Asia and North America and it likes cold weather. Many have used it traditionally as a treatment for disorders like anxiety and depression and more recently fatigue and even neurodegenerative diseases.
HIV has been an issue for many year. This virus is the one responsible for the majority of AIDS cases. It can be transmitted through, body fluids, such as blood, semen, and genital secretions, or from an HIV-infected mother to her child during pregnancy, delivery, or breastfeeding (through breast milk).