Up to 250 athletes from 40 countries will compete in the iQFOiL World Championships.
Green light for schemes in Weymouth, Dorchester, Portland and Chickerell and Corfe Mullen and Upton.
Dorset Council is challenging the move, accusing the regulator of failing to address wider risks.
Plans to burn more types of waste at Portland incinerator cannot be refused, a regulator rules.
Billy Bragg is performing to support the campaign against the Portland incinerator.
Weymouth, Portland and Chickerell young people are being offered jabs after April's cases in Dorset.
Chris Burston is among 32 patients to have taken part in a groundbreaking immunotherapy trial.
Proposed areas include Weymouth, Dorchester, Portland, Chickerell, Corfe Mullen and Upton.
Dorset council leader restates the authority's "longstanding opposition" to the proposed facility.
