Infectious disease doctors, politicians and activists plan a vigil at 4 p.m. Thursday near offices for Moderna and Pfizer, saying their practices make them rich by prolonging the pandemic in poorer countries. It comes just hours before their CEOs are due to get awards for “inspired leadership.”

A rally and bicycle ride celebrating the installation of protected bike and bus lanes on Massachusetts Avenue in North Cambridge is scheduled for noon Saturday at the Linear Park at Cedar Street and Massachusetts Avenue.

The reopening of the Collins branch library in West Cambridge has been postponed due to delays in construction upgrades to the roof, gutters, and ventilation system begun Oct. 4.

An emergency order requiring masks in indoor public places was issued Friday by the city to take effect at 8 a.m. Sept. 3 for everyone over the age of 2 – a response to a surge in Covid-19 cases and the coronavirus’s highly contagious delta variant.

A free conversation with interim Cambridge Public Schools superintendent Victoria Greer is planned for 6 p.m. Thursday by My Brother’s Keeper, Cambridge, and 22-CityView, the municipal cable channel.

An event for the loved ones of Cambridge homicide and suicide, abuse and bullying victims has been scheduled from 2 to 6 p.m. Saturday in Danehy Park, in Neighborhood 9.

A Rally for Our Youth is planned for 5 p.m. Monday at City Hall to raise awareness of the city’s increased gun violence.

The 130 workers demand that the Tufts administration either pay them this summer after a surprise cancellation of their work or allow them to collect unemployment insurance until the fall semester.

The city has opened a cooling center during the extreme heats of this week and is welcoming residents to come cool down in certain city buildings as well.

The current timeline for reopening municipal offices now that the coronavirus pandemic has faded was explained Monday to the City Council by City Manager Louis A. DePasquale.