VACCINIA. (COW-POX.)
The important discovery of vaccination is due to Dr. Jenner, who ascertained that when the cow was affected by this disease and it was then communicated to man, the affection was rendered very mild and devoid of danger, and at the same time it proved a very complete protection against small-pox. Like most other valuable discoveries introduced to the world, it encountered bitter prejudice and the most unfair opposition. Now its inestimable value is generally known and admitted.
In a few cases, in which the quality of the vaccine virus was deteriorated, its effect is only to slightly-modify small-pox, and then the disease resembles that caused by inoculation. The operation of infecting the blood with the kine virus is called vaccination. All that we know is that when the cow becomes affected with this disease, and it is then transferred to man, it loses its severity and serves as a protection against small-pox. In a great majority of cases this protection is absolute, and only in a very few does it leave the subject susceptible to small-pox, materially modified. The protection it affords against small-pox is found to diminish after the lapse of an indefinite number of years, and hence it is important to be re-vaccinated once or twice, for instance, after an interval of five years. Between the second and third months of infancy is the best period for vaccination, and the place usually selected is the middle of the arm above the elbow-joint.
CHICKEN-POX. (VARICELLA.)
Chicken-pox is an eruptive disease, which affects children, and occasionally adults. It is attended with only slight constitutional disturbance, and is, therefore, neither a distressing nor dangerous affection. The eruption first appears on the body, afterwards on the neck, the scalp, and lastly on the face. It appears on the second or third day after the attack, and is succeeded by vesicles containing a transparent fluid. These begin to dry on the fifth, sixth, or seventh day. This disease may be distinguished from variola and varioloid by the shortness of the period of invasion, the mildness of the symptoms, and the absence of the deep, funnel-shaped depression of the vesicles, so noticeable in variola.
Treatment. Ordinarily very little treatment is required. It is best to use daily an alkaline bath, and, as a drink, the tea of pleurisy-root, catnip, or other diaphoretics, to which may be added from one-half to one teaspoonful of the Extract of Smart-weed. If the fever runs high, a few drops of aconite in water will control it.
MEASLES. (RUBEOLA.)
This is generally a disease of less severity and importance than the other eruptive fevers, but it is sometimes followed by serious complications. The stage of invasion is marked by the symptoms of a common cold, sneezing, watery eyes, a discharge from the nostrils, a dry cough, chilliness, and headache. This stage may last four days. Then follows an eruption of red dots or specks, which momentarily disappear on pressure. On the fourth day of the eruption the redness of the skin fades, the fever diminishes, and the vesicles dry into scales or little flakes. The eyes may be inflamed and the bowels may be quite lax at this stage.
Treatment. The great object in the treatment is to bring out the eruption. To effect this, sweating teas are beneficial. The free use of the Extract of Smart-weed is recommended, and the skin should be bathed every day with tepid water. Sometimes when warm drinks fail to bring out the eruption, drinking freely of cold water and keeping warmly covered in bed, will accomplish the desired result.
False Measles (Rose Rash) is an affection of very little importance and may be treated similarly to a case of ordinary measles.