Public Health Wales is urging parents to ensure their children have the second MMR "booster" jab, as four more cases emerge of measles
Two cases have already been confirmed as experts continue to focus on Cwmtawe School, in Port Talbot, where the new cases have been reported.
A vaccination session was held there last week.
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Police say the road is currently closed in both directions between Baverstocks and Hirwaun and is expected to remain closed for some time.
All 555 of Thomas Cook’s travel agencies in the UK were acquired on short-term leases by Hays Travel.