The doctor who discovered the new Omicron Covid-19 variant has said the UK is panicking unnecessarily, while South Africa’s health minister said travel restrictions on his country are “uncalled for”.

Joe Phaahla claimed international travel restrictions will not prevent the spread of the virus and instead suggested regular testing and mask wearing, including for flying, are effective measures to help live with the virus.

Meanwhile, the doctor who discovered the Omicron variant said the UK is “panicking unnecessarily” when asked on the BBC’s The Andrew Marr Show.

Dr Angelique Coetzee, chair of the South African Medical Association, told the programme she first encountered the variant in a man in his early 30s who presented with tiredness and a mild headache, but none of the usual coronavirus symptoms.

She said: “What we are seeing clinically in South Africa, and remember I’m at the epicentre – that’s where I’m practising – it’s extremely mild. For us, that’s mild cases.”

When asked if the UK was “panicking unnecessarily”, she said: “I think you already have it there in your country and you’re not knowing it, and I would say, yes, at this stage I would say definitely.

“Two weeks from now maybe we will say something different.”

South Africa was the first country to detect the new Omicron variant of Covid-19.

Two cases have since been confirmed in the UK but South Africa and some other African nations have been added to UK red lists for international travel.

Speaking on LBC radio, South Africa’s health minister Dr Phaahla said wealthier countries like the UK need “definitely” need to give more vaccine doses to countries in Africa.

Dr Phaahla said he has heard from medical professionals in his country that young unvaccinated people have been admitted to hospital with the variant form of Covid-19.

He said he has heard anecdotally that cases of the new variant have been “mild” and mostly in the young, for whom vaccination rates are relatively low in South Africa.

Dr Phaahla also said the UK’s travel restrictions are “very unfortunate and uncalled for”.

He said “we’ve been here before”, adding: “We’ve seen in practice that it doesn’t work.

“The US did that in the beginning of Covid-19 … and many other countries followed … but in the end throughout the various waves of Covid-19 we’ve come to terms with the fact that even by the time we were informed by the scientists of this variant, it was gone, it was already everywhere.”

He said “we’ve learned over these last 20 months how to live with the virus” and outlined a number of measures such as masks and regular testing, including for flights, which he said are recognised worldwide and “are working”.

He added: “Otherwise you just a create false sense of safety amongst your people when it is not safe.”

Boris Johnson held a call with South Africa’s president Cyril Ramaphosa on Friday afternoon.

Dr Phaahla said: “When he [President Ramaphosa] reported to us about that discussion he did indicate that he expressed our view that we believe this is uncalled for … it’s a futile exercise in a way. Very much a false sense of security which is not going to help.”

Asked if young unvaccinated people are ending up in hospital with the new variant in South Africa, Dr Phaahla said “Yes. Younger, unvaccinated people … 65% of those they’ve admitted, who are mainly younger people, are actually those who are unvaccinated.”

He said he has heard from GPs that the “majority of the people they’ve been seeing are mild”, but stressed it is “not proper research”.

Asked what he knows about how unwell people are who have the new strain, Dr Phaahla said: “It is still too early at this stage.

“Some of what I’ve read from some of our clinicians has been that thus far they have not witnessed severe illness. Part of it may be because the majority of those who are positive are young people.”

He added at this stage they do not know what proportion of the younger people who have Omicron are ending up in hospital.