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Health authorities are concerned when hundreds or thousands of individuals get ill in most instances of outbreaks of infectious diseases. Nipah virus is different. A single confirmed case may put a whole region on alert. Schools are shut, hospitals initiate isolation units, and contact tracing is launched at once. This is because the reason is very simple and terrifying: Nipah is rare, unpredictable, and can kill as many as three out of every four individuals infected by it. Not many viruses can unite such a deadly rate with the possibility to infect animals and people and further individuals. It is this lethal mix that makes doctors and epidemiologists not treat Nipah as a disease but rather as a health crisis that is about to occur in the public.

The identification of the Nipah virus took place in 1998 when pig farmers in Malaysia got involved in an outbreak. Initially starting as an enigmatic fever, it turned into a neurological crisis, where the patients had become confused, experienced seizures and went into a coma. It resulted in the death of more than 100 people, and more than a million pigs were culled to curb the spread. Since then, there have been occasional outbreaks in Bangladesh and India, mostly in Kerala, where even small outbreaks have required rapid containment. Nipah does not transmit quickly via the air and on a city-to-city basis, as in the case of influenza or COVID-19. Rather, it is transmitted silently by close contact, contaminated food or animals, but once it enters a person, its effects can be disastrous.

The fruit bat or the flying fox is the natural host of the virus. These bats become the carriers of the virus, and they do not get sick since their immune systems have evolved. There is no protection, however, for human beings. Often, the transmission starts with something that seems unambiguously mundane. In rural Bangladesh, as an example, fresh date palm sap is consumed overnight in open pots by people as a tradition. The sap is often contaminated with the virus by fruit bats licking or urinating on them. Individuals who consume it unrefined might end up exposing themselves unknowingly. On the same note, half-eaten fruits that are touched by bats or come into direct contact with infected animals, such as pigs, can become a source of infection. A bite mark that makes it seem a harmless bite in the fruit can, under rare circumstances, cause a fatal outbreak.

After penetration into the human body, the virus can occur either through the nose, mouth or eyes. It initially infects the respiratory system and is transmitted through the bloodstream. Being an RNA virus in the family of paramyxovirus, Nipah steals human cells and transforms them into factories of the virus. New viral particles are created in thousands, which destroys tissues and organs. Nipah often attacks the brain, unlike other common infections, which usually do not spread beyond the throat or the lungs. This is the brain involvement that is referred to as encephalitis, and it contributes to the danger of the disease, especially.

It typically takes four to fourteen days, but some have taken three weeks to manifest their symptoms. The initial symptoms are similar to the flu: fever, headache, muscle aches and vomiting, and sore throat. These symptoms are very common, hence most patients initially dismiss them. The sickness may, however, get worse very fast. Patients can become confused, sleepy, abnormally behaved, experience seizures and have breathing difficulties within days. A coma may result in brain swelling. The course is so alarmingly rapid, doctors say--the person who apparently was slightly unwell in the morning can be in the ICU at night.

The statistics highlight the severity. The World Health Organisation points out that Nipah has a case fatality rate of 40-75 that fluctuates according to the outbreak and the standard of medical treatment. In the outbreaks in 2018 and later on in Kerala, isolation, testing, and contact tracing were done within a short period of time, which resulted in the limitation of spreading the disease, but some fatalities were still recorded. In other cases, one sick individual has infected dozens of health workers and other relatives, compelling them to quarantine. These incidents depict the way in which even the restricted human to human transmission can put a strain on the healthcare systems.

The other disturbing factor is that the current cure or vaccine is not a specific one that is widely available. The treatment is primarily based on supportive care: oxygen, intravenous fluids, seizures, and strict monitoring. Hospitalisation at an early age would enhance survival, and physicians are unable to kill the virus directly using the available medications. The absence of specific treatment is one of the reasons why prevention is of utmost importance. Education through the mass media on proper washing of fruits, avoiding any fruits with bites, not consuming raw date palm sap, and limiting contact with bats or diseased animals. Hygiene and isolation are crucial during outbreaks.

The recovery is not necessarily a full recovery to normal life for survivors. Late neurological impairments are widespread because the virus affects the brain. Clinical reports and studies indicate that there are survivors who lose their memory, find it hard to concentrate, change in personality, have seizures, or feel weak. There are also mental effects like anxiety and depression. In uncommon and disturbing instances, the late-onset encephalitis may be experienced several months or even several years after the initial recovery, that is, the effects of the virus re-emerge. This is the risk that does not go away, hence Nipah is not similar to most other viral diseases that have a full recovery process.

Although it is not as well-known as illnesses such as Ebola or SARS, there is a rather strong belief among experts that Nipah is one of the most alarming new types of viruses. It is a combination of many perilous characteristics.

Finally, the Nipah virus is a paradox. It is obscure enough that not many people have ever heard of it, but fatal enough that physicians are terrified of it. One contaminated fruit, a glass of raw sap or being in close touch with a patient will trigger a chain reaction that will be life-threatening. It is not to panic but to be prepared. The best defence is awareness, hygiene, early detection, and a quick response of the population to public health. Until such a powerful vaccine or antiviral medication is invented, the only weapon of humanity against this silent but deadly virus is prevention and education.

To the point, Nipah can only lead to minor outbreaks, yet the threat is out of proportion. When a virus can strike the brain in the first place, develop faster in several days, and kill over 50 per cent of those who have the virus, just a single case will warrant extreme concern.

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