There has been a Meningitis B death in Reading and two others are undergoing treatment, according to media reports.
The UK Health Security Agency (UKHSA) said one of the cases has been confirmed as Meningitis B (MenB), and it is awaiting further results on the other two.
The close contacts of those affected were being offered antibiotics as a precaution.
It said information has been shared about the infection with students and parents at all affected schools but the risk to the wider public was low.
Rachel Mearkle, a consultant in health protection, said: “We are working closely with partners and have provided public health advice and precautionary antibiotic treatment to close contacts of the cases. Meningococcal disease does not spread easily and the risk to the wider public remains low.
Spike in vaccine demand: Picard
According to National Pharmacy Association (NPA) chair Olivier Picard, "This is a tragic case and our thoughts are with the friends and family of those affected.
"Pharmacies in the area, including my own, have already seen a very significant increase in demand for vaccination against MenB from worried parents.
"Although pharmacies are now carrying more stock than when we saw the outbreak in Kent, this is having to be managed carefully and the demand could well exceed what pharmacies currently having in supply.
"The JCVI should urgently publish its recommendations for MenB vaccinations and whether this should be extended to teenagers and young adults, in the light of these recent outbreaks."
"Concerned families should follow closely advice from the UK Health Security Agency (UKHSA) who state the risk to the wider public remains low.
"Pharmacies stand ready to support public health efforts locally."
Picard told Pharmacy Business that his pharmacy received over a hundred calls. "Our supplies and the capacity to store the vaccines are limited."
