A top health official said yesterday classes could resume at all primary schools and kindergartens after the Easter holiday as there had been no sharp increase in flu cases. Guidelines about disinfection would be distributed to all schools, Director of Health Lam Ping-yan said. 'We will continue to monitor the situation and have meetings with the Education Bureau and Social Welfare Department,' he said. 'Considering the present situation, there is no sharp increase in flu cases and there is also no increase in the number of serious cases. I believe classes could resume as scheduled.' Alex Cheung Chi-hung, chairman of the Aided Primary School Heads' Association, said he hoped the government would make a decision and inform all schools in good time as to whether they should remain closed or resume classes after Easter. 'We hope the government can inform us a bit earlier, and please do not make an announcement after 10.30pm again,' he said. 'We really can't take it any more.' Mr Cheung said school principals were frustrated that the government had released little information about flu viruses affecting children and how serious the flu outbreak may have been. 'Are we facing some kind of virus which is fierce and strong? Is there anything we can do other than telling children to wear masks and keep washing hands?' The association also expressed concern that schools might have to shorten summer holidays if another ban was imposed because of flu. 'Our association has talked to the Education Bureau, and we are told that flexibility is allowed, but schools have to report to district offices of the bureau and inform them what arrangement they have and how students' learning will not be affected,' Mr Cheung said. A spokeswoman for the Education Bureau said schools could be flexible about holiday arrangements as long as children's education was not negatively affected.