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The Islamic calendar is a lunar one, where each month begins when the first crescent of a new moon is sighted. The Islamic year consists of 12 lunar cycles, and consequently it is 10 to 11 days shorter than the solar year, and as it contains no intercalation, [a] Ramadan migrates throughout the seasons.
Ramadan [b] (Arabic: رَمَضَان, romanized: Ramaḍān [ra.ma.dˤaːn]; [c] also spelled Ramazan, Ramzan, Ramadhan, or Ramathan) is the ninth month of the Islamic calendar, [10] observed by Muslims worldwide as a month of fasting , prayer , reflection, and community. [11]
Respiratory syncytial virus (RSV), [a] also called human respiratory syncytial virus (hRSV) and human orthopneumovirus, is a virus that causes infections of the respiratory tract. It is a negative-sense, single-stranded RNA virus. [2] Its name is derived from the large cells known as syncytia that form when infected cells fuse. [2] [3]
Bubonic plague is one of three types of plague caused by the bacterium Yersinia pestis. [1] One to seven days after exposure to the bacteria, flu-like symptoms develop. [1] These symptoms include fever, headaches, and vomiting, [1] as well as swollen and painful lymph nodes occurring in the area closest to where the bacteria entered the skin. [2]
The virus is highly contagious and is spread by coughing and sneezing via close personal contact or direct contact with secretions. [52] Measles is the most contagious virus known. [20] It remains infective for up to two hours in that airspace or nearby surfaces.
The COVID-19 pandemic in Indonesia is part of the worldwide pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
Influenza A virus and influenza B virus co-circulate, so have the same patterns of transmission. [1] The seasonality of influenza C virus, however, is poorly understood. Influenza C virus infection is most common in children under the age of two, and by adulthood most people have been exposed to it.
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. [1] Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. [2] [3] Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity.