The US health authorities registered more than three times as many new cases as in any previous wave of the coronavirus.
The total COVID-19 tally includes 9,287 cases of the Omicron variant.
The United Kingdom has already added India to its travel "red list" on a precautionary basis after reporting 103 cases of a coronavirus variant first identified in India, the country's health minister Matt Hancock said on Monday.
Maharashtra Chief Secretary Sitaram Kunte in an order issued on Sunday declared Kerala, Goa, Gujarat, Delhi and the National Capital Region, Rajasthan and Uttarakhand as places of "sensitive origin".
A health official department bulletin said the XBB variant reported in the state had "growth advantage over BA.2.75 and immune evasive property".
The study also shows that levels of these antibodies that are able to recognise and fight the virus are lower with increasing age, and that levels decline over time, providing additional evidence in support of plans to deliver a booster dose to vulnerable people.
'All actions for COVID-19 should be the same as for other routine health conditions.' 'There is no need to report the matter in the media all the time; not on front page please.'
Director of the US National Institute of Allergy and Infectious Diseases, Dr Fauci said that India made the "incorrect assumption" that they were finished with COVID-19.
China reported 17,166 asymptomatic cases with a majority of them in Shanghai, China's business hub of 26 million.
The Delta variant of COVID-19, or the B1.617.2 variant of concern (VOC) first identified in India, is about 60 per cent more transmissible than the Alpha strain identified in the United Kingdom and also reduces the effectiveness of vaccines to some extent, UK health experts report.
There are at least seven major variants of coronavirus, including B.1.617 and B.1.351 (Beta), in Varanasi and its adjoining areas, according to a study conducted by the Banaras Hindu University and the Centre for Cellular and Molecular Biology (CCMB).
Most Indians have acquired hybrid immunity which means immunity developed through vaccines and also natural infection protecting them from different COVID-19 variants.
The patient is currently admitted to the Lok Nayak Jai Prakash (LNJP) Hospital and has mild symptoms, hospital officials said.
The UK on Saturday detected two cases of the new COVID-19 variant, Omicron, according to health secretary Sajid Javid as he added four more African countries to Britain's travel red list.
BA.4 and BA.5 are sub-variants of the highly-transmissible Omicron variant of the virus.
The research, published in the journal JAMA Pediatrics, is the first large-scale study to compare the health outcomes of coronavirus infection from Omicron and Delta in the age group which is not yet vaccinated.
The sources said that of the 124 positive samples, genome sequencing results of 40 were received of which XBB, including XBB.1, was found in 14 samples and BF 7.4.1 in one sample.
The Delta Plus variant have been detected sporadically in Maharashtra, Kerala and MP.
Pfizer's chief executive Dr Albert Bourla told the BBC that he is of the view that annual vaccinations would be needed to maintain a "very high level of protection" against the deadly disease that has claimed over five million lives across the world.
The B-1617 variant of the coronavirus, first identified in India, has been classified as a variant of concern at the global level by the World Health Organisation (WHO).
It is the second death due to this variant in Maharashtra as it had claimed the life of an 80-year-old woman from Ratnagiri district on June 13.
The move came soon after Belgium confirmed a case of the B.1.1.529 variant in someone who had travelled back from Egypt earlier this month, with the European Union (EU) member states agreeing to a snap travel ban on seven African nations.
What do we know about India's devastating second wave, and can we assign responsibility for it?
Easy access to this kind of test could help people determine what kind of precautions they should take against COVID-19 infection, such as getting an additional booster shot, the researchers said.
The government on Thursday took a series of measures in view of the rising number of COVID-19 cases in several parts of the world, including China.
Vaccines Covishield and Covaxin work against SARS-CoV-2 variants Alpha, Beta, Gamma and Delta, while effectiveness tests against the Delta Plus variant is ongoing, the government said.
Union minister Gajendra Singh Shekhawat on Wednesday said the Bharatiya Janata Party is ready for virtual election rallies and the party will follow the Election Commission's guidelines.
'When this COVID-19 restarted, the first thing I observed was that the patients are all below 50 years.'
Experts in Singapore, which is seeing a surge in Omicron cases, have warned that the new and supposedly more contagious variant is likely to replace Delta over the coming weeks as the dominant global variant, with the virus being fitter and having a reproductive advantage.
The international team of researchers combined lab-based experiments and epidemiology of vaccine breakthrough infections, showing that the Delta variant is better at replicating and spreading than other commonly-observed variants.
The highly transmissible Delta variant of SARS-CoV-2 has mutated further to form the 'Delta plus' or 'AY.1' variant but there is no immediate cause for concern in India as its incidence in the country is still low, scientists in New Delhi said.
Wang Guangfa, a respiratory expert from Peking University First Hospital, warned that Beijing may experience a spike in severe COVID-19 cases over the next fortnight.
'We seem to be in a situation where we can do little, and nothing needs to be done anyway.'
The results were the same in seniors, with a median age of 76, and caregivers, with a median age of 48, and old alike, according to the researchers.
A nine-year-old lioness Neela and a male lion named Pathbanathan, aged 12 years, succumbed to COVID-19 earlier this month.
If the pandemic persists, at least a portion of the blame should go to greed and nationalism that got in the way of the world acting together, notes Prosenjit Datta.
Expressing concern over the COVID-19 situation, the chief minister urged Prime Minister Narendra Modi to widen the vaccination ambit to cover those younger than 60 as the mutant has been found to be infecting young people more, an official statement quoting him said.
There have been 41 cases of Covid in the most recent four-week period ending mid-January, with three deaths.
On June 14, the World Health Organization designated the Lambda variant, previously known by its formal scientific name C.37, as the seventh and newest "variant of interest".
22 cases of the Delta Plus variant of the coronavirus have been detected in India, with 16 of them being reported from Maharashtra and the remaining from Madhya Pradesh and Kerala, the government said.
