Companies are heeding the government's call to calmly take precautions against H1N1 swine flu after it was upgraded Thursday to a global pandemic by the World Health Organization.

Many firms have no immediate plans to step up their measures against the new strain of influenza, as the initial wariness against it in the corporate sector has eased. Instead, they are continuing existing precautionary steps, including instructing employees to wear masks and wash their hands, companies said.

The announcement of a global pandemic and upgrading to the highest level of Phase 6 by WHO Director General Margaret Chan will not bring an "abrupt change in the domestic situation," an official of Toshiba Corp. said.