Bed bug bites are 0.2-0.5 cm in diameter and appear in lines. Bites are red, swollen, and itchy like other insect bites. Allergic reactions may include hives, swelling, or pus. Full body reaction takes up to 2 weeks
Top 10 causes accounted for 39 million deaths worldwide in 2021. COVID-19 emerged as second leading cause, killing 8.8 million people. Noncommunicable diseases accounted for 38% of all deaths globally. Alzheimer's disease ranked seventh, killing 1.8 million globally
MERS-CoV is an emerging zoonotic virus. Dromedary camels serve as the animal reservoir. Virus is considered emerging in the Middle East region
MERS is a coronavirus-related respiratory illness first identified in Saudi Arabia in 2012. Typical symptoms include fever, cough, and shortness of breath. Mortality rate is approximately 35%, though mild cases may be missed. Disease is more severe in people with weakened immune systems
Fewer than a hundred pathogenic bacteria exist in humans. Most bacteria are harmless commensals or saprophytes. Pathogenic bacteria can overcome normal body defenses
HIV is a retrovirus that attacks the immune system. Without treatment, life expectancy is 11 years. Disease has three stages: acute infection, clinical latency, and AIDS. HIV-1 is more virulent than HIV-2