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COVID-19 mostly kills through an overreaction of the immune system, whose function is precisely to fight infections, say scientists who have decoded the mechanisms, symptoms, and diagnosis of the disease caused by the SARS-Cov-2 coronavirus.

In a study published in the journal Frontiers in Public Health, the researchers explained step-by-step how the virus infects the airways, multiplies inside cells, and in severe cases causes the immune defences to overshoot with a "cytokine storm".

This storm is an over-activation of white blood cells, which release too-great amounts of cytokines -- inflammation-stimulating molecules --into the blood, they said.

"Similar to what happens after infection with SARS and MERS, data show that patients with severe COVID-19 may have a cytokine storm syndrome," said study author Daishun Liu, Professor at Zunyi Medical University in China.

"The rapidly increased cytokines attract an excess of immune cells such as lymphocytes and neutrophils, resulting in an infiltration of these cells into lung tissue and thus cause lung injury," Liu said.

The researchers explained that the cytokine storm ultimately causes high fever, excessive leakiness of blood vessels, and blood clotting inside the body.

It also causes extremely low blood pressure, lack of oxygen and excess acidity of the blood, and build-up of fluids in the lungs, they said.

The researchers noted that white blood cells are misdirected to attack and inflame even healthy tissue, leading to failure of the lungs, heart, liver, intestines, kidneys, and genitals.

This multiple organ dysfunction syndrome (MODS) may worsen and shutdown the lungs, a condition called acute respiratory distress syndrome, (ARDS), they said.

This, the researchers explained, happens due to the formation of a so-called hyaline membrane -- composed of debris of proteins and dead cells -- lining the lungs, which makes absorption of oxygen difficult.

Most deaths due to COVID-19 are therefore due to respiratory failure, they said.

The researchers explained that in the absence of a specific antiviral cure for COVID-19, the goal of treatment must be to the fight the symptoms, and lowering the mortality rate through intensive maintenance of organ function.

For example, an artificial liver blood purification system or renal replacement therapy can be used to filter the blood through mechanical means, they said.

The team noted that especially important are methods to supplement or replace lung function, for example with non-invasive mechanical ventilation through a mask, ventilation through a tube into the windpipe, the administration of heated and humidified oxygen via a tube in the nose, or a heart-lung bypass.

The researchers stressed the importance of preventing secondary infections.

They noted that SARS-Cov-2 also invades the intestines, where it causes inflammation and leakiness of the gut lining, allowing the opportunistic entry of other disease-causing microorganisms.

The researchers advocate that this should be prevented with nutritional support, for example with probiotics -- beneficial bacteria that protect against the establishment of harmful ones -- and nutrients and amino acids to improve the immune defences and function of the intestine.

"Because treatment for now relies on aggressive treatment of symptoms, preventative protection against secondary infections, such as bacteria and fungi, is particularly important to support organ function, especially in the heart, kidneys, and liver, to try and avoid further deterioration of their condition," Liu added.

An uncertain prognosis, severe shortage of resources and the imposition of unfamiliar public health measures that infringe on personal freedoms along with large and growing financial losses are undoubtedly contributing to the widespread psychological and emotional distress associated with COVID-19.

The COVID-19 pandemic has forced millions of people to work from home world-wide. Today, due to constant exposure to increasing numbers, an intense fear of contamination have a massive psychological impact on people who are working from home.

Kuhoo Gupta, Healer and Founder of The K Junction talks about wellness during work from home as the situation is resulting in people being vulnerable to severe mental illnesses. Staying positive and optimistic while working from home during pandemic can be heavily challenging.

Gupta states its critical to maintain your mental well-being and immune system, as people with mental upheavals are prone and susceptible to various flu or inflammations. Your bodies immune system reacts abnormally which diminishes the capability of it's function.

The only key to manifesting a wonderful well-being is to try and calm one's mind and focus on constructive and wellness activities, to find a path towards making ourselves more resilient while working from home. Gupta shares 5 tips you can start doing today to improve and enhance your positive outlook.

Remember! Your workplace should be a sacred space where you are able to find a sense of comfort in your work environment. It should help you feel positive, healthier and happier, more like a protective zone.

Fabricating a Positive Workstation

There should be a separate workstation so that one can concentrate while working from home. It would be great if the work desk is stationed somewhere near a window or a balcony door so that one can welcome sunlight, fresh air and a view of plants & birds during the day. Try to have an ergonomic setting of your table and chair so that you keep your posture right while working the whole day. Keeping one or two indoor plants near your work desk will help to make it interesting.

Keep your laptop charger wires and other stuff neatly on your desk to avoid overwhelming yourself. Motivation quotes around you will help to make you overall positive. Keep your notes diary and pen handy at your desk. It will always helps to keep some colorful artifacts around you to make the atmosphere a little cheerful.

Declutter Your Workstation

Avoid the pilling up files and unnecessary stationery at your workstation. Clutter is responsible for the confusion and problems all around and it leads to distraction; thus, a clean desk reflects power which enhances positivity and creates a tranquil workspace that will help your mind focus on productivity. It is important to declutter your work desk once in a few days because physical clutter translates to mental clutter.

Gratitude Notes in workstation and how to manifest

It is a great morning practice to write at least five things you are grateful for. It helps to shift the focus from negative to positive, from scarcity to abundance. One can write gratitude statements on Post it notes and put them at the work daily. This will raise the vibrations and help you stay grounded and positive. You can also compile affirmations and prayers that you resonate. Whenever you take work breaks, it is a good idea to read these.

Crystals to imbibe positivity at workstation

Selenite is a great crystal to spread light and positivity around. Black tourmaline absorbs negativity and is great to shield you from it during lockdown. Shungite is a great crystal to reduce the effects of electromagnetic radiations around you. You can place it near your wifi router, laptop and other devices to reduce the EMF pollution effects on you and your family. Clear quartz is great for energizing you after a tiring meeting. Just hold it in your left hand with eyes closed for five minutes and visualise beautiful energy entering your body and soul.

You can combine this exercise by holding black tourmaline in your right hand and visualize all the tiredness and unwanted energy draining into the black tourmaline. Tiger eye is very effective in eliminating the scattered brain and it allows us to make confident decisions. Green Aventurine neutralizes stress and anxiety from work, allowing us to keep calm.

Lepidolite is known as the Peace Stone, making it one of the best crystals for peace. It improves our overall mood, calms us, soothes us, and reduces our anxiety with a peaceful sense of happiness.

Sodalite is a great crystal for peace because it turns fear and stress into peaceful feelings. It also helps in better communication and can help while making crucial presentations & meetings.

Fluorite is great for healing and rejuvenating the mind and body. You can close your eyes and sit quietly with Fluorite while imagining your body being filled with an incredible energy that puts you at ease with yourself and the world.

Pyrite, also known as abundance stone, is great to put over your business card to manifest abundance at work.

Don't forget to clean your crystals regularly to harness their maximum energy.

Meditate, Do Pranayam and Stay Hydrated!

It is important to take short breaks to maintain productivity at work. Being summer, it is a good idea to get up for a water break once in 30 minutes at least. Even if you keep a water bottle alongside you, walking to the kitchen for water will help your physical body get some much needed movement.

Few iterations of square breathing once in two hours is a great way to boost your mind and body. Square breathing is basically the sequence of inhalation - holding breath - exhalation - holding breath - all for equal time spans. So you can count mentally 1 to 4 in inhalations, then again counting 1 to 4 as you hold your breath, and so on and so forth.

You can also chant any mantra while taking a work break for 1 or 2 minutes. While attending online meetings, where there is nothing much your hands are doing, you can utilize that time to do Yoga Hast/Hand Mudras and harness their energies. Pran Mudra is one of the best options to practice while attending meetings or reading articles, where your hands are free essentially.

You can Also -

Dress up like you would do while going to office so as to feel good in general

Go out on your terrace/balcony once or twice a day to get some fresh air, sunlight and hear birds chirping

Say yes to distractions rather than getting irritated from them, because you cannot avoid them while working from home, like the kids, TV sounds, kitchen sounds etc.

Lower neighbourhood socioeconomic status and greater household crowding increase the risk of becoming infected with SARS-CoV-2, the virus that causes COVID-19, warn researchers.

"Our study shows that neighbourhood socioeconomic status and household crowding are strongly associated with risk of infection," said study lead author Alexander Melamed from Columbia University in the US.

"This may explain why Black and Hispanic people living in these neighbourhoods are disproportionately at risk for contracting the virus," Melamed added.

For the findings, published in the journal JAMA, the researchers examined the relationships between COVID-19 infection and neighbourhood characteristics in 396 women who gave birth during the peak of the Covid-19 outbreak in New York City. Since March 22, all women admitted to the hospitals for delivery have been tested for the virus, which gave the researchers the opportunity to detect all infections -- including infections with no symptoms -- in a defined population

The strongest predictor of COVID-19 infection among these women was residence in a neighbourhood where households with many people are common.The findings showed that women who lived in a neighbourhood with high household membership were three times more likely to be infected with the virus. Neighbourhood poverty also appeared to be a factor, the researchers said.Women were twice as likely to get COVID-19 if they lived in neighbourhoods with a high poverty rate, although that relationship was not statistically significant due to the small sample size.

The study revealed that there was no association between infection and population density.

"New York City has the highest population density of any city in the US, but our study found that the risks are related more to density in people's domestic environments rather than density in the city or within neighbourhoods," says co-author Cynthia Gyamfi-Bannerman."

The knowledge that SARS-CoV-2 infection rates are higher in disadvantaged neighbourhoods and among people who live in crowded households could help public health officials target preventive measures," the authors wrote.

Recently, another study published in the Journal of the American Planning Association, showed that dense areas were associated with lower COVID-19 death rates.