The figure overtook the 432 cases reported a day earlier, which was the country’s highest increase in a 24-hour span then.
The number of active cases in the country has gone up to 2,936, the highest it has been since the outbreak in January.
Health director-general Tan Sri Dr Noor Hisham Abdullah said the Tembok cluster in Kedah recorded more than half of yesterday’s cases, with 394 infections (57%).
He, however, assured the public that the cluster, which is centred at the Alor Setar Prison, was isolated from civilians.
“All the positive cases detected in the Tembok cluster are within the targeted enhanced movement control order (MCO) area. This means they are isolated from the community,” said Dr Noor Hisham when giving updates on the Covid-19 situation live from his home, as he is undergoing quarantine.
The Tembok cluster has now become the biggest and most active cluster in the country, with 1,047 positive cases attributed to it so far.
A 14-day targeted enhanced MCO was implemented at the prison and the staff quarters in the surrounding area since Sunday.
Earlier in the day, Dr Noor Hisham had posted a graph projecting the course of Covid-19 cases with an infectivity rate (R0 value) of 0.3, 1.5, and 2.2.
With the R0 value of 0.3, it is estimated that cases will taper down to below 500 cases by Oct 31. However, with an R0 of 1.5 and 2.2, it is projected that the number of cases will rise to more than 1,000 and 4,500 cases respectively by Oct 31.
“This graph is the simplest to illustrate our current scenario. Let us all come together to flatten the curve again.
“As we approach the 10-month mark of the Covid-19 pandemic, our lives and normalcy have been fundamentally disrupted.
“Controlling the large-scale community transmission is our top priority. We need strong solidarity and unity. Together we can better fight this common enemy,” he tweeted yesterday.
A graph forecasting the total number of cases by Oct 10 was also posted up by Dr Noor Hisham.
The graph showed that the country would record more than 20,000 cases by Oct 10, if the reproduction number (Rt) was at 1.86.
Rt is an indicator of how fast Covid-19 is spreading.
With the rise of the Tembok cluster cases, Kedah remains the state with the highest number of cases with 397, followed by Sabah which has 219 cases.
Selangor reported 38 local cases, followed by Perak (eight), Negri Sembilan (seven), Johor (six), Kuala Lumpur (four), Sarawak (three), Penang (three), Terengganu (one), Putrajaya (one) and Labuan (one).
Three cases were imported – from India, Egypt and the Philippines – while the rest were local transmissions.
Yesterday, there were four new Covid-19 related fatalities, bringing the death toll to 141 cases.
There are two new clusters – the Batu cluster in Taiping, Perak, which has seven cases, and the Ramai-Ramai cluster in Sandakan, Sabah, with 20 cases.
On the Sabah Covid-19 situation, Dr Noor Hisham said the Health Ministry had increased the capacity of its hospitals to deal with the outbreak.
“As of Oct 6, there are 2,820 beds at the Health Ministry’s hospitals and 3,975 at the quarantine and low-risk centres. The usage of these facilities are 36% and 29% respectively out of the nation’s total.
“As for the intensive care units (ICU), there are 437 beds set aside for Covid-19 patients, or 6% of the country’s total. A total of 1,505 ventilators have been prepared at our hospitals in the state,” he said.
Meanwhile, 87 more patients were discharged, bringing the total recoveries to 10,427.
Cumulatively, the country’s total cases stand at 13,504.
Currently, 31 people are being treated at ICU, with eight of them requiring ventilator support.