KARACHI (PPI) - 700 GAVI vaccinators announced boycotting polio vaccine drive beginning this month as a token of protest against non-payment of their salaries. Vaccinators Welfare Association Chairman Junaid Ahmed Shah, Maula Bux Chandio and Nabi Bux Jalbani made the announcement after locking up EPI store at the II Depot here on Thursday. They vowed no tot perform vaccination duties across the province until their salaries paid.