(Reuters) – Ontario is in the sixth wave of the COVID-19 pandemic driven by the highly transmissible BA.2 sub-variant of the Omicron coronavirus and hospitalizations are likely to rise over the coming weeks, the most populous Canadian province’s top doctor said on Monday. “In the last few weeks we have seen an increase in the percent positivity and upward trend in wastewater surveillance and a rise in hospitalizations. These trends are likely to continue for the next several weeks,” Ontario’s chief medical officer Kieran Moore said at a briefing. However, Moore said a rise in infections was no…