BEIJING : China is offering candidate vaccines for the new coronavirus to employees at state-owned firms travelling overseas, as it seeks more data on their efficacy, state media Global Times reported on Thursday.No proven vaccines have been developed yet for the virus, although mass trials for a number of candidate vaccines are expected to get underway soon in countries around the world.Employees in China can volunteer to take one of two vaccine candidates being developed by affiliates of state-owned China National Pharmaceutical Group (Sinopharm), the newspaper backed by the Communist Party reported, citing a written notice sent to the state-owned companies.It did not name the two candidate vaccines, which are being tested on more than.