On Tuesday, two Palestinian protesters were killed by Israeli occupation forces' fire, but the number of protesters - and wounded - declined dramatically from Monday as Gazans mourned those killed the day before.
But a doctor in Gaza told the Associated Press news agency that the infant may have had a pre-existing medical condition.
A senior Israeli commander confirmed to Reuters that at least 60 Palestinians were killed Monday.
"So I took her with me on the bus".
In addition, Israeli drones fired gas bombs at the tents of the Return Camp, including medical tents, in Khuza'a town, east of the southern Gaza Strip city of Khan Younis.
Eight-month-old Leila al-Ghandour was exposed to the gas during major protests yesterday, in which the health ministry said 58 Palestinians were killed. Monday was one of the deadliest days we have seen since the 2014 war, with six children killed and more than 220 children hurt, including more than 150 who were shot by live ammunition, according to the Palestinian Ministry of Health in Gaza.
Leila's family said her mother had left the baby at home to join the demonstrations. They stayed only a few minutes, Heyam insisted, before tear gas rained down on them. "We got away from the gas and gave Leila to my sister and went looking for two other children so we could leave".
The Israeli military said at least 24 of those killed on Monday were "terrorists with documented terror background" and majority were active operatives of Hamas. She was crying a lot, then she went silent. They often can not afford the medicines or medical bills for follow up care and extremely anxious about their children's futures - which they say were already being steadily eroded by more than 10 years of Israeli blockade, falling donor interest.
Thousands of Palestinians had gathered on Gaza Strip's eastern border Monday to take part in protests aimed to commemorate the Nakba anniversary and protest the relocation of the U.S. Embassy from Tel Aviv to Jerusalem.
Mr Regev said: "If we allow the Hamas terrorists to enter Israel, we will have dead Israelis".
UN General Secretary António Guterres said he was "profoundly alarmed and concerned by the sharp escalation of violence". Nikki Haley, US ambassador to the United Nations, said on Monday the country has acted with "restraint".