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Hace 1 día · Pandemics timeline death tolls. This is a list of the largest known epidemics and pandemics caused by an infectious disease in humans. Widespread non-communicable diseases such as cardiovascular disease and cancer are not included.
Hace 16 horas · Influenza, commonly known as " the flu " or just " flu ", is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These symptoms begin one to four (typically two) days after exposure to the virus and last for about ...
Hace 5 días · Los Virus. A. Concepto y Características. Descubiertos por Iwanovski en 1892 como agentes causantes del mosaico del tabaco que pasaban a través de los filtros bacterianos. Organización acelular. No crecen ni se relacionan con otros virus ni con el medio. Pueden cristalizar. Muy pequeños (<2500Å, visibles solo con el M.E.) y de estructura simple.
Hace 2 días · Impacts. COVID-19 portal. v. t. e. SARS-CoV-2, the causative agent of COVID-19, was first introduced to humans through zoonosis (transmission of a pathogen to a human from an animal), and a zoonotic spillover event is the origin of COVID-19 that is considered most plausible by the scientific community.
Hace 3 días · A virus is an infectious microbe consisting of a segment of nucleic acid (either DNA or RNA) surrounded by a protein coat. A virus cannot replicate alone; instead, it must infect cells and use components of the host cell to make copies of itself.
Hace 4 días · respiratory syncytial virus (RSV), infectious agent of the respiratory system that typically produces a mild cold like illness but in susceptible individuals, particularly infants under six months of age, is a major cause of severe and potentially fatal lower respiratory disease.
Hace 4 días · Los paramixovirus son virus relativam ente grandes que poseen un genoma compuesto por una molécula de ácido ribonucleico (ARN ) monocatenario de sentido negativo contenida en una nucleocápside helicoidal rodeada de una envoltura pleomórfica de aproximadamente 156 a 300 nm.
