OTTAWA, Oct 29 (Reuters) - A Canadian decision on whether to approve Pfizer Inc"s (PFE.N) COVID-19 vaccine for those aged 5 to 11 will not come before mid- to end-November, a senior official said on Friday. "I think we"re still at least a few weeks away from a final decision ... we"ve received some additional information just this past week that we"rem looking through," Supriya Sharma, the federal health ministry"s chief medical adviser, told a briefing.