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Tuberculosis generally affects the lungs, but it can also affect other parts of the body. [1] Most infections show no symptoms, in which case it is known as latent tuberculosis . [ 1 ] Around 10% of latent infections progress to active disease that, if left untreated, kill about half of those affected. [ 1 ]
Common infections that spread by airborne transmission include SARS-CoV-2; [14] measles morbillivirus, [15] chickenpox virus; [16] Mycobacterium tuberculosis, influenza virus, enterovirus, norovirus and less commonly other species of coronavirus, adenovirus, and possibly respiratory syncytial virus. [17]
[21] [22] According to the World Health Organization, approximately 10 million new TB infections occur every year, and 1.5 million people die from it each year – making it the world's top infectious killer (before COVID-19 pandemic). [21] However, there is a lack of sources which describe major TB epidemics with definite time spans and death ...
Coronaviruses also affect other branches of animal husbandry such as pig farming and cattle raising. [127] Swine acute diarrhea syndrome coronavirus (SADS-CoV), which is related to bat coronavirus HKU2, causes diarrhea in pigs. [134] Porcine epidemic diarrhea virus (PEDV) is a coronavirus that has recently emerged and similarly causes diarrhea ...
Asymptomatic carriers play a critical role in the transmission of common infectious diseases such as typhoid, HIV, C. difficile, influenzas, cholera, tuberculosis, and COVID-19, [2] although the latter is often associated with "robust T-cell immunity" in more than a quarter of patients studied. [3]
Coronavirus diseases are caused by viruses in the coronavirus subfamily, a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, the group of viruses cause respiratory tract infections that can range from mild to lethal.
COVID-19 is not a sexually transmitted infection; while the virus has been found in the semen of people who have COVID-19, there is no evidence that the virus spreads through semen or vaginal fluid, [53] however transmission during sexual activities is still possible due to proximity during intimate activities which enable transmission through ...
A large number of people who survived tuberculosis still experience symptoms such as breathlessness and coughing. Although the severity is not well understood, some people have reduced quality of life and exercise capacity. [4] [2] In severe cases, people may experience hospitalizations and death related to respiratory causes. [2]