At least one person has been killed and 11 others injured, including children, in the attack on al Bab.
Several troops were reported injured by the Russian defence ministry after a joint military patrol was hit by an improvised explosive device near Ariha town of Idlib.
Four earlier attempts to reach consensus on the issue had failed as the council had been deadlocked, with most members pitted against Syrian allies Russia and China, which abstained in the council's fifth vote this week on the issue.
After Moscow and Beijing wielded vetoes for a second time this week, only three countries joined Russia in backing its proposal to cut the number of aid transit points from two to one.
The patient is a physician at Bab al Hawa hospital, adding to doctors' concerns about the pandemic reaching northwest Syria where a regime offensive uprooted around a million people earlier this year.
An April report by a new investigations team at the Organisation for the Prohibition of Chemical Weapons found the Syrian regime air force used sarin gas and chlorine on the village of Lataminah in March 2017.
Moscow's attempt to halve access for humanitarian aid deliveries to Syria from Turkey to just one border crossing voted down at Security Council.
Russia, a close ally of Bashar al Assad's regime in Syria, immediately circulates a draft Security Council resolution that would authorise the delivery of aid through a single crossing point from Turkey for six months.
The attack was carried out with a car bomb and wounded civilians were treated in hospitals on both sides of the border.
UN investigators said that "indiscriminate bombardment" by pro-regime forces ahead of a March ceasefire brokered with Turkey, claimed hundreds of lives.
The UK-based Syrian Observatory for Human Rights said 20 pro-regime fighters and 31 Daesh terrorists were killed during the clashes in the central desert province of Homs in last three days.
Anguished relatives are poring over photos of torture victims from Syrian prisons, posted online by activists after the US imposed heavy new sanctions on the Syrian regime last month.
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