France last week stepped up virus controls for travellers arriving from India as well as some other countries where variants are spreading.
In India, more than 350,000 infections were reported within 24 hours on Monday, more than any country has reported in that timespan.
Japan added some 4,300 cases on Wednesday for a total of about half a million with 9,500 deaths.
Till March 10, a total of 64 United Kingdom returnees have tested positive during RT-PCR tests.
According to CNN, blood serum samples from people who had received two doses of the Pfizer-BioNtech vaccine "efficiently" neutralised a version of the virus.
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The research, published in the journal Nature Medicine, noted that the vaccine is effective against coronavirus variants carrying the N501Y and E484K mutations.
Anyone who does not have a valid reason for travel will be directed to return home and may face a fine, according to the statement.
German national daily Die Welt said that researchers at Hannover Medical School detected the new variant in samples of an elderly patient who teted positive around November and later died
The State made institutional quarantine compulsory for 14 days those who arrive at the states airports from European and West Asian countries