The Spokesperson told Xinhua that BA.4 and BA.5 continued to be the most dominant sub-variants in South Africa but they were less severe due to higher levels of immunity. The department called on the people not to panic.
While existing vaccination can still reduce the risk of severe Covid disease, the variants can evade many of the neutralising antibodies that are the immune system's front line of defence.
Earlier, Karnataka Health Minister K. Sudhakar had said that some studies have shown that the fourth wave of Covid-19 may start in June-July and last till September, and the state is prepared to face it.
The Weekly Positivity Rate in the country currently stands at 0.43 per cent, while the Daily Positivity rate has reported considerable rise at 0.53 per cent. However, Delhi's positivity rate stands at 5.70 per cent as per the health bulletin issued on Wednesday.
The new sub-variant, designated as Omicron BA.4 and BA.5 has already been detected in three other countries and on four people in Botswana.