Covid
Antibodies raised by Covid-19 vaccine less effective against few Coronavirus variants

Antibodies induced by some COVID-19 vaccines are less effective at neutralising the new circulating variants of the novel coronavirus, such as the ones reported in the UK, Brazil and South Africa – according to a study published in the journal Cell.
It added that the neutralising antibodies induced by the Pfizer and Moderna Covid-19 vaccines were less effective against the coronavirus variants first found in South Africa and Brazil.
As per the scientists, neutralising antibodies work by binding tightly to the virus and preventing it from entering the cells and this way, it prevents infection. That said, this binding only happens when the antibodies and viruses perfectly match, like a key in a lock. Also, if the shape of the virus changes when the antibody attaches to it, the antibody may no longer be able to recognise and neutralise the virus.
Covid
Study: 4th Covid vaccine dose effective in protecting people over 60

As per the new Israeli-led study, the largest healthcare organisation Clalit said fourth dose of Covid vaccine is effective for protecting people aged 60 and above.
The study found that a fourth dose can reduce the possibilities of symptomatic infection, hospitalisation, serious illness and mortality among the elders, Clalit said, Xinhua news agency reported.
In the study, published in the New England Journal of Medicine, Clalit researchers and their colleagues from Harvard University in Boston analysed data from 182,122 Clalit members, all aged 60 and above, who received Pfizer’s fourth dose.
“The study unequivocally demonstrates that the fourth dose provides effective protection in preventing morbidity,” said Ran Balicer, Director of the Clalit Research Institute.
“It will help every person to make a decision on the fourth vaccine based on their level of personal risk,” he added.
Covid
Covid-19: Here are the symptoms of fourth wave

covid-19 pandemic. BA.2 has two characteristics – they are dizziness and extreme tiredness. BA.2 sub-variant or stealth omicron affects more on the stomach and intestines of the people, which leads to digestive problems. there is currently no evidence that people can catch covid-19 from food. the virus that causes covid-19 can be killed at temperatures similar to that of other known viruses and bacteria found in food.
Symptoms of Omicron:
- Fever
- Continuous Cough
- Fatigue
- Muscle and body health
- Shortness of breath
- Difficulty in breathing
- Skin rash
- Sleeping paralysis
- Heartburn
- Bloating
- Back pain
- Delirium
- A loss of appetite
- High temperature
- Sore throat
- Chest pain
- Abdominal pain
- Covid toes or figures
- Covid tongue
- Night sweats
- Diarrhoea
- Hoarse voice
- New loss of taste and smell
- Congestion or running nose
- Nausea or vomiting
- Headache
Covid
Covid-19: WHO shares post COVID symptoms

In the third year of pandemic, it is not just a fight against COVID, we have another challenge ahead of us i.e. dealing with post-COVID conditions. They are also known as long COVID conditions. With the growing number of cases of long COVID it is confirmed that COVID does not spare any body organ and it affects the biological ecosystem. Fatigue, trouble in breathing and cognitive dysfunction is the most common symptoms.
Fatigue: It is very common response from the body when fighting against any viral infection. It may last for weeks and it is very common symptom seen in all the patients who recovered from COVID.
Trouble in breathing: Even with the minimal physical activity person may have trouble in breathing. It is very common occurrence in the people who have been infected with COVID.
Cognitive dysfunction: It is commonly referred as brain fog. It actually means people having trouble with their attention, trouble in concentrating, trouble in recall or memory, trouble in sleeping.
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