Prime Minister Muhyiddin Yassin said the move to vaccinate senior citizens against Covid-19 appears to be paying off with incidents of severe symptoms among them declining.
Taking stock of this, Muhyiddin said this was why Operation Surge Capacity, which aims to administer at least the first dose of the vaccine to all adults in Selangor and Kuala Lumpur, was launched.
"This is the government's immediate action to manage the spike of Covid-19 cases in Selangor and Kuala Lumpur.
"Data has shown that serious Covid-19 cases fell drastically with the administration of vaccines," he said in a statement.
Muhyiddin gave the example of admissions at the Sungai Buloh Hospital.
"Among senior citizens (60 and above), the admission trend of Covid-19 patients at Sungai Buloh Hospital in Category 4 and 5 has fallen by more than 50 percent in the last month.
"Senior citizens were in Phase 2 of the Covid-19 vaccination programme and the positive impact is now visible," he said.
Category 1 and 2 patients suffer milder symptoms, Category 3 ones develop some form of pneumonia but can still likely breathe on their own, those in Category 4 need oxygen supply while Category 5 patients need a ventilator to breathe.
Likewise, Muhyiddin said the positive effects of the Covid-19 vaccine are also being observed among healthcare workers.
"Only 1.26 percent of the Health Ministry's medical staff who have been vaccinated were infected with Covid-19. (And) 99.8 percent of them only experienced mild symptoms or were asymptomatic. None were in Category 5.
"Another example is Labuan where the Delta variant in the country was first detected. The government took immediate action to increase vaccine supply there.
"As a result, the number of Covid-19 cases and deaths from Covid-19 in Labuan (was) reduced with increased vaccination rate," he said.
Daily new Covid-19 cases in the country broke 10,000 on July 13 and have remained above that threshold.
The silver lining is that the number of patients in the intensive care unit dipped under 900 after peaking at 972.
Deaths, many in the Klang Valley, remain high. The country recorded more than 100 Covid-19 deaths each day for the last five days.
The government is now working to expedite the vaccination efforts in the Klang Valley.