World News
Why do some people avoid Covid-19 when those around them have it? Study explains
The Omicron variant of the coronavirus has caused a global surge in Covid-19 infections. The highly mutated strain is believed to bypass existing vaccines and deliver a stronger infection to the host.
However, despite living with someone with Covid-19, some people do not contract the virus. How can this be?
A new study explores this angle, claiming that these people may have been exposed to other coronaviruses in the past, allowing them to make memory immune cells — called T cells. They offer higher protection against Covid-19.
“Cross-reactive immune responses to SARS-CoV-2 were observed in pre-pandemic cohorts and suggested to help protect the host,” said the study, published in the journal Nature, which examined 52 Covid-19 household contacts to capture their immune responses. The idea is to capture the immune response at the earliest time point after exposure to the Sars-CoV-2 virus.
Viruses from the coronavirus family, while causing different diseases, share some common characteristics, the researchers noted.
Their shared structural similarities enable immune cells that recognize one type of coronavirus to recognize the other, the study said.
Blood of all 52 household contacts was tested on days one to six. The researchers found higher levels of memory T cells in samples from people who tested negative for Covid-19 PCR than those who tested positive.
The researchers said the T cells they measured targeted not only the spike protein part of the virus, but also the nucleocapsid, the core part of the virus that stores its genetic material.
Meanwhile, earlier this week, an infectious disease expert said that vaccinated and unvaccinated people experience different Omicron symptoms.
Complete News Source : Hindustan Times
Haryana
Delhi Weather and AQI Today: Warm start at 22.05 °C, check weather forecast for October 22, 2024
Check the weather forecast and air quality updates for Delhi on October 22, 2024 here.
The temperature in Delhi today, on October 22, 2024, is 32.93 °C. The day’s forecast indicates a minimum and maximum temperature of 22.05 °C and 35.04 °C, respectively. The relative humidity is 26% and the wind speed is 26 km/h. The sun rose at 06:26 AM and will set at 05:44 PM.
Tomorrow, on Wednesday, October 23, 2024, Delhi is predicted to experience a minimum and maximum temperature of 27.42 °C and 34.91 °C, respectively. Tomorrow humidity levels will be at 20%.
With temperatures ranging between 22.05 °C and 35.04 °C, prepare for a hot day and plan outdoor activities accordingly. If you are sensitive to heat, take note of the weather forecast and consider appropriate attire and activities suitable for the prevailing weather.
The AQI in Delhi today stands at 334.0, falling in the very poor category. Everyone should be cautious. Children and people with respiratory diseases, such as asthma, should stay indoors and others should also limit their outdoor activities. Usage of masks and air purifying devices is advised. Being aware of the AQI helps one make informed decisions regarding one’s overall well-being while planning the day’s activities.
Weather and AQI predictions in Delhi for next 7 days:
Date Temperature Sky October 23, 2024 32.93 °C Sky is clear October 24, 2024 32.69 °C Sky is clear October 25, 2024 32.5 °C Sky is clear October 26, 2024 32.07 °C Sky is clear October 27, 2024 30.69 °C Sky is clear October 28, 2024 31.29 °C Sky is clear October 29, 2024 32.09 °C Sky is clear
Weather in other cities on October 22, 2024
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