The two general types of alternative pressure therapy are sham acupressure and the use of the P6 point. A 2015 study found  no significant difference between the use of either therapy in the treatment or prevention of PONV. In a review of 59 studies, both therapies significantly affected the nausea aspect, but had no significant effect on vomiting. Cannabinoids have also been used for treatment of PONV, but its safety and efficacy are controversial. Epidemiology
Typically, the incidence of nausea or vomiting after general anesthesia ranges between 25 and 30%. Nausea and vomiting can be extremely distressing for patients, and so is one of their major concerns. Vomiting has been associated with major complications, such as pulmonary aspiration of gastric content, and might endanger surgical outcomes after certain procedures, for example after maxillofacial surgery with wired jaws. Nausea and vomiting can delay discharge, and about 1% of patients scheduled for day surgery require unanticipated overnight admission because of uncontrolled PONV. References
Further reading
Blackburn, J., Spencer, R. (2015). Postoperative nausea and vomiting. Pleuvry, B. (2015). Physiology and pharmacology of nausea and vomiting. == External links ==
Antiviral drugs have been examined for activity in pox viruses and cidofovir is believed to display potential in this area. Recent cases
In March 2007, a two-year-old Indiana boy and his mother contracted the life-threatening vaccinia infection from his father who was vaccinated against smallpox as part of the standard vaccination protocol for individuals serving in the US armed forces beginning in 2002. The child developed the pathognomonic rash which typifies eczema vaccinatum over 80 percent of his body surface area. The boy has a history of eczema, which is a known risk factor for vaccinia infection. See also
List of cutaneous conditions

References
External links

Side Effects of Smallpox Vaccination. Centers for Disease Control and Prevention Fact Sheet. Vaccine Reaction Images. CDC.