Ifop survey showed that 60 percent had flouted the rules at least once, either by giving a false reason for going out on their self-signed permission slip or by meeting up with family and friends.
An improvised explosive device struck the Remembrance Day ceremony, attended by representatives of France, Greece, Italy, the United Kingdom and the United States, the French embassy in Saudi Arabia said.
Organisers of the industrial action say the health of both students and teachers is at risk due to insufficient protocols to protect against the virus.
Yannick Jadot's comments come a day after American laboratory Pfizer reported its candidate vaccine had shown 90 percent success rate in preventing people from catching the coronavirus.
France's health director said the main cities put under curfew mid-October were starting to see a lesser spread of the disease, but he stressed the peak of the Covid-19 pandemic was still to come.
Coming days will be crucial in determining whether President Macron‘s measures are sufficient to stem the spread of the virus and relieve pressure on hospitals, as econimic outlook deteriorates.
