Syphilis
Syphilis is a sexually transmitted disease (STD) that can cause long-term complications or death if not treated properly. Symptoms in adults are divided into phases. These stages are primary, secondary, latent, and advanced syphilis.
You can get syphilis through direct contact with a syphilis sore during anal, vaginal, or oral sex. Sores can be found on the penis, vagina, anus, rectum, or lips and mouth. Syphilis can also spread from an infected mother to her unborn baby.
Symptoms may include fever, swollen lymph glands, sore throat, partial hair loss, headaches, weight loss, muscle pain, and fatigue.
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Smallpox
Smallpox is a contagious disease that can be disfiguring and deadly, and has affected humans for thousands of years. Naturally occurring smallpox was eradicated worldwide in 1980, as a result of an unprecedented global vaccination campaign.
There is no cure or treatment for smallpox. A vaccine can prevent smallpox, but the risk of side effects from the vaccine is too high to justify routine vaccination in people at low risk of exposure to the smallpox virus.
The first symptoms of smallpox usually appear 10 to 14 days after infection. During the 7-17 day incubation period, you look and feel healthy and cannot spread it to other people.
After the incubation period, there is the sudden onset of flu-like signs and symptoms. Some of them are the following:
- Fever
- General discomfort
- Headache
- intense fatigue
- severe back pain
- vomiting, possibly
A few days later, flat, red spots appear on the face, hands, and forearms, and later on the trunk.