quote: The human body does not start out being able to fight off disease
quote: An infants immune system is not quite yet fully developed at birth and takes about a year or two but that does not mean we are not born with the ability to fight off disease.
quote: All of this anti-bacterial and ultra-cleanliness of the past decade or so has led to an increase in allergy sufferers.
quote: Don't forget about germ mutation, the more we fight off these germs the more the mutate, into a more resilient super virus, take a look at MRSA.
quote: Vaccinations against viruses: Vaccines can be successful against viruses. There are successful vaccines against many viruses including smallpox, chicken pox, measles, mumps, rubella, and others. The body's immune system kills viruses by actually killing the whole cell that is virus infected. Virus vaccines teach the body's immune system how to recognize specific virus-infected cells. Unfortunately, some viruses are difficult to create vaccines against, because they mutate, and the body cannot easily recognize the newly mutated form. Vaccination against the flu is only partially helpful because there are so many strains of the flu. Flu viruses mutate very often, which explains why a new flu vaccine is needed each year. The HIV virus is also particularly good at mutating itself, and has defied attempts to create a HIV vaccine as yet. Similarly, vaccines against the most common viruses, such as the common cold, remain elusive.
quote: Since viruses contain both RNA and DNA they are completely able to mutate.
quote: The body's immune system kills viruses by actually killing the whole cell that is virus infected.
quote: however antibiotics do not cause their mutation!
quote: While antibiotic resistance and antiviral drug resistance are very real phenomena, they have no real bearing on the actual ability of evolutionary processes to create new genetic information [...] Antibiotic resistance and antiviral drug resistance are excellent examples of microevolution...