Introduction

 Coronavirus Disease (COVID-19) is an infectious disease caused by the SARS-CoV-2 virus. The majority of COVID-19 patients will experience mild to moderate symptoms and will recover without the need for additional treatment. On the other hand, some people will become dangerously ill and require medical attention.

 On December 1, 2019, the first case of COVID-19 was announced, and the cause was a new coronavirus known as SARS-CoV-2 at the time. SARS-CoV-2 may have begun in an animal and then developed (mutated) into a human-infectious virus.

Viruses that originated in birds, pigs, bats, and other animals in the past evolved to become dangerous to humans, resulting in a number of infectious disease outbreaks. More research is needed to figure out how and why the coronavirus became capable of causing pandemic illness.

 The incubation period for COVID-19

After being exposed to the virus, symptoms develop two to fourteen days later. Depending on their immune system and the severity of their illness, a person infected with the coronavirus can be infectious to others for up to two days before symptoms occur and for up to 20 days after symptoms appear.

 Symptoms 

The Symptoms of COVID-19 include:

·         Cough

·         Chills or a fever

·         Breathing problems or shortness of breath

·         Aches in the muscles or throughout the body

·         Throat irritation

·         New olfactory or gustatory impairment

·         Diarrhea

·         Headache

·         New exhaustion

·         Vomiting or nausea

·         Congestion or a runny nose is both symptoms of congestion.

Minor COVID-19 symptoms appear in some people infected with the coronavirus, while others show no symptoms at all. COVID-19, on the other hand, has been linked to respiratory failure, long-term lung and heart muscle damage, nervous system problems, kidney failure, and death in certain individuals.

 How COVID-19 is diagnosed? 

A laboratory test is used to diagnose COVID-19. Because many COVID-19 signs and symptoms might be caused by other disorders, a diagnosis based solely on inspection is difficult. Some patients infected with the coronavirus show no signs or symptoms.

 Omicron Coronavirus new variant 

A World Health Organization (WHO) expert council designated a new Covid-19 strain initially discovered in South Africa as a "highly transmissible" virus of concern on Friday, naming it Omicron in the Greek-letter system. Early evidence implies a higher risk of reinfection, according to the panel.

On Friday, the discovery of a new coronavirus variant sent shivers through much of the world, as countries rushed to halt air travel, markets plummeted, and scientists convened emergency meetings to assess the risks, which were still largely unknown.

Medical experts and organizations, including the World Health Organization, have warned against overreacting until the southern African variant is better understood. Nearly two years after Covid-19 surfaced and launched a pandemic that has killed over five million people throughout the world; a nervous world anticipated the worst. 

There's no way of knowing whether the variation causes more severe disease right now. Some afflicted people, like those infected with other variations, show no symptoms, according to South African researchers.

Despite the fact that some genetic modifications are concerning, it is unclear whether the new variety will pose a significant public health risk. Some previous, varieties like the Beta variety, alarmed scientists at first but did not spread widely.

 Early cases

 Belgium was the first country in the EU to report a case of the variation. Health Minister Frank Vandenbroucke remarked, "It's a suspicious variant." "We're not sure if it's a particularly harmful version."

According to Professor Marc Van Rant, who works for the scientific group overseeing the Belgian government's Covid-19 response, the Belgian case involved a traveler who returned to Belgium from Egypt on November 11 but did not become sick with mild symptoms until Monday, demonstrating how complicated the spread of a variant can be.

Israel, which has one of the highest vaccination rates in the world, reported on Friday that it has discovered its first case of the new variety in a visitor returning from Malawi. The tourist was confined in isolation with two other suspicious cases. All three were immunized, according to Israel, although officials were investigating the travelers’ specific immunization status.

Passengers on KLM Flight 598 from Capetown, South Africa, to Amsterdam were delayed on the edge of the runway for four hours on Friday morning at Schiphol airport pending special testing after a 10-hour overnight flight. Passengers on a flight from Johannesburg were also isolated and subjected to tests.

 Inequity in vaccination

 The development of the variation, according to some scientists, demonstrated how wealthy countries' vaccine hoarding threatens to extend the pandemic.

Fewer than 6% of Africans have had a full Covid-19 vaccination, and millions of health professionals and vulnerable populations have yet to receive a single dose. These circumstances could hasten the virus's spread, giving it more chances to develop into a deadly variety.

This is one of the repercussions of vaccine inequities, according to Michael Head, a senior research fellow in global health at the University of Southampton in the United Kingdom. "The snatching of surplus vaccines by richer countries will inevitably backfire on us all at some point,' he said. "Go beyond vague promises and actually deliver on their commitments to share doses," he urged the Group of 20 leaders.

The new variation has heightened investor concerns that months of progress with Covid-19 could be undone. According to Jeffrey Halley of foreign exchange broker, investors are likely to fire first and ask questions later until additional information is available.

The market's so-called fear indicator, known as the volatility index, soared 48 percent to a reading of 26.91, indicating how frightened Wall Street has grown. The volatility indicator has reached its highest level since January, when vaccines were widely disseminated.

Dr. Michael Ryan, the WHO's chief of emergencies, warned against "knee-jerk reactions" before the EU announcement.

"We have seen in the past that the minute any type of difference is mentioned, everyone closes borders and restricts travel," Ryan added. "It's critical that we keep our eyes alert and our minds engaged."

The Africa Centers for Disease Control and Prevention agreed and warned against imposing travel restrictions on nations that reported the new variety. According to the report, previous experience demonstrates that such travel prohibitions do not have a significant impact.

 How to protect yourself from Coronavirus

 SARS-CoV-2, the coronavirus that causes COVID-19, has now been approved for vaccination. However, until more is known about how immunizations impair a person's ability to transmit the virus, COVID-19 prevention measures including mask use, physical separation, and hand hygiene should be continued regardless of vaccination status. Find out more about the COVID-19 vaccine and how to stay protected.