The family of four members including two children, are UK citizens who had arrived from England on February 20 and were quarantined at Hotel Vivanta situated at Dwarka, the plea said.
"The new variant spreads faster. We have to tread carefully as we do not know if the people who have recovered from the coronavirus have any sort of immunity from the new strain," said Jagat Ram.
The first instance of local transmission of the mutant variant of Covid-19 was detected in the state on Tuesday.
The town of Corzano in the Lombardy region has been swabbing close contacts of students and teachers in a school where 24 people tested positive for Covid-19 last month.
A smaller, separate trial also showed that it was about 60 per cent effective against the South African variant, despite concerns that this strain may not respond to vaccines.
The two companies said they are "prepared to respond" if a new strain is shown to be able to evade the immunity of the vaccine, adding that they can produce updates to their jab if needed.
The situation is being monitored and regular advice is being given to the states for enhanced surveillance, containment, testing and dispatch of samples to INSACOG laboratories.
All the people who have tested positive for the new variant of the virus were kept in single-room isolation at designated healthcare facilities by the respective state governments.
Tony Shepherd, Venues NSW Chair, said that the SCG has taken significant measures to ensure the safety of fans attending the third Test.
There are 2,50,183 active coronavirus cases in the country, which accounts for 2.43 per cent of the total caseload, the data stated.
Karnataka has so far the highest number of cases in the country of people infected with the new UK variant of the SARS-CoV2 virus.
'Our teams are trying to trace all of them. Six of them who reached Mumbai before December 22 have been found positive for coronavirus,' said executive health officer Dr Managala Gomare, BMC.
To a question whether police cases will be registered, Dr K Sudhakar said, 'I am compelled to say that I will discuss with the Home Minister and decide the future course of action.'
181 returned to Odisha from UK in last 1 month, 63 samples sent for test of which two tested positive
The Indian government earlier this week suspended flights from the UK until the end of the year over fears of the new strain.