As reported by Express and Starall jab flu shipments have now been sent to all of the UK and are available to those who need them
All orders from new and improved flu injections have been distributed throughout the country, the NHS UK said, leading health officials to call parents to ensure they receive their vaccinations.
Concerns about vaccine shortages have been rampant, due to staggering vaccine shipments.
Many are worried about this phased approach, and a survey of 650 doctors by Pulse found that 68.5% of the practices experienced a deficiency.
However, Seqirus – distributor of vaccines – has now sent final supplies to Britain.
Those over the age of 65 were encouraged more than ever to get their jab in what has been dubbed the "largest flu vaccination program ever" NHS.
The NHS England says that 8.5 million people will be able to receive vaccines, free before winter.
Professor Jane Cummings, head of nursing nurses for the UK, said: "This is the biggest flu vaccination program we've ever done that offers more people than ever the biggest opportunity to help protect themselves.
"This year three types of vaccines are being used, including the Adjuvanted trivalent flu vaccine, or TIV, which should provide better protection for people 65 and older.
"Delivery of aITV has been going on since September and with all vaccines now being sent to general practitioners and pharmacies, we urge those who have not received their flu shots to get it as soon as possible.
"About 8.5 million doses of vaccine have been ordered, with around one million surplus doses available. The current absorption rate for those aged 65 or over is 45.2% so we want to see an increase in that number.
"In addition to older adults, and those with long-term conditions, we want other risk groups such as pregnant women and small children to be protected as well. It is definitely not too late for people to be vaccinated. "
British medical director of public health, professor Paul Cosford, added: "Flu can be very serious and can kill the most vulnerable. Vaccination so far is the best defense we have.
"Anyone who is at high risk of being affected by the flu is offered a free vaccine.
"In addition to having your flu vaccine, the best way to prevent the spread of flu is to practice good hand hygiene.
"Catch coughing and sneezing in tissue, discard tissue and wash hands."
Professor Dame Sally Davies, head of the British medical officer, said: "Flu can kill and vaccines are the only best way to protect yourself and those around you.
"More vaccines than ever before are available and I strongly encourage everyone in the vulnerable group to contact the GP or the pharmacy and get a jab."
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