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Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.
Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
![Each of the eight injectors shown are producing a correct spray pattern for the applications. While ...](https://biology-forums.com/gallery/30/medium_548020_30_05_17_11_26_28_3001172.png)
![Growth cones. The cytoplasmic fingers (the filopodia) of growth cones seem to grope for the correct ...](https://biology-forums.com/gallery/30/medium_548020_06_06_17_12_41_55_30343765.png)