Respiratory diseases caused by viruses essay
1 Introduction. Since the century, outbreaks of pathogenic viruses and their complex interactions with human and animal species have led to interspecies transmission, posing a major threat to human health and safety. Rapid globalization and human activities have resulted in the transmission of pathogens across continents within two decades, three highly pathogenic and deadly human coronaviruses have emerged, namely SARS-CoV, MERS-CoV and SARS-CoV-2. The economic burden and health threats caused by these coronaviruses are extremely dire and are becoming more serious as the number of global infections increases and measles is a highly contagious disease caused by a virus. It spreads easily when an infected person breathes, coughs or sneezes. It can cause serious illness, complications and even death. Measles can affect anyone, but is most common in children. Measles infects the respiratory tract and then spreads throughout the body. During the COVID-19, you may have heard that the coronavirus, COVID-19, is similar to the flu. COVID-the flu are both contagious respiratory diseases. They are both caused by viruses. They have some common symptoms. But COVID flu infections can affect people in different ways. Also 1. Introduction. Respiratory tract infection RTIs are at the center of public health developments given their widespread distribution and the high morbidity and mortality rates reported worldwide. The RTIs are defined as diseases of infectious etiology involving the respiratory system. The clinical spectrum ranges from,