Public Health Scotland described the amount of laboratory confirmed influenza this winter as “extraordinary” – with prevalence at 52.6 per 100,000 of the population in the week up to December.
In the same week, 1,537 people were taken to hospital as a result of the flu outbreak, compared to 1,375 the previous week.
Only a “small number” of deaths have been reported, according to reports.
Public Health Scotland revealed that a “substantial number of well-vaccinated” care homes have faced outbreaks.
A spokesperson said: “The combined number of hospital admissions for influenza, respiratory syncytial virus and Covid-19 have risen by 6% to 1,878 in the week up to 29 December.
NHS Ayrshire and Arran said: “If you’re eligible for the COVID-19 and/or seasonal flu vaccine, you can drop by a local clinic without an appointment.”
Covid-19 and flu vaccines can be given to over 65s, pregnant women, frontline health and social care workers (including care home and care at home staff).
Flu vaccines only can be given to anyone aged 18-64 with certain health conditions, weakened immune systems, unpaid carers, and non-patient facing health and social care staff.
Drop-in clinics are available for eligible groups aged 12 and over. Check the venues and times on the NHS Ayrshire & Arran website.
Lynne McNiven, director of public health for NHS Ayrshire & Arran, said: “Winter vaccines help the body to build up maximum protection, so those eligible for one or both vaccines who have not yet come forward are being urged to do so now.
“Our dedicated vaccination teams have been working hard in communities across Ayrshire delivering winter vaccines since September.
“Teams are delighted to now be able to offer additional opportunities for people to get their flu and COVID vaccinations without an appointment.”