Scientist of the Beijing Institute of Biotechnology and the Tianjin Can Sino Biotechnology, have developed a new Ebola virus vaccine which will have lasting immunity. This vaccine has been found to be safe in the first phase, one trial based on the 2014 strain of the virus.
Until now, all tested Ebola virus vaccines have been based on the virus strain from the Zaire outbreak in 1976.
“On the basis of our findings, we believe that the Ebola vaccine we assessed has some potential,” said researcher Fengcai Zhu from the Jiangsu Provincial Center for Disease Prevention and Control in China.
“A significant advantage of this type of vaccine is that stable and much easier to store or transport in tropical areas with inadequate cold-chain capacity, such as Africa,” Zhu added.
For the trial, 120 healthy Chinese adults were randomly assigned in equal numbers to receive placebo, a low dose, or high dose of the vaccine.
The researchers found that 28 days after vaccination, 38 out of 40 participants in the low-dose group and all 40 of those in the high-dose group had a positive immune response to the vaccine, with participants in the high-dose group producing higher quantities of antibodies than those in the low-dose group.
However, the researchers are not sure if this vaccine will be the perfect vaccine to fight Ebola virus.
“Whether this candidate vaccine could become a final vaccine for widespread use against Ebola outbreaks is still uncertain, because of the issues of HIV-1 acquisition rates and the pre-existing immunity, especially in west Africa,” Zhu noted.
Efforts to boost global action against climate change are stuttering, as several key nations have objected to a key United Nations-backed report on the impacts of rising temperatures at the COP24 talks in Poland.
Many developing nations say they are already suffering from the impact of climate change, especially in south Asia and Africa, where water shortages and intense storms are putting lives and livelihoods in danger.
In Malawi in southern Africa, a bustling fish market stood at Kachulu on the shores of Lake Chilwa just five months ago. Now, hundreds of fishing boats lie marooned across the vast bay as vultures circle over the cracked, sun-baked mud. Water levels here fluctuate annually, but scientists say climate change is making the seasonal dry-out of the lake far more dramatic. Fishermen are being forced to leave and look for work elsewhere, says Sosten Chiotha, of the non-governmental organization ‘LEAD’ – Leadership for Environment and Development.
“Climate change contributes to the current recessions that we are experiencing, because you can see that in 2012 there was a recession where the lake lost about 80 percent of its water. Then it recovered in 2013, but not fully. So since then every year we have been experiencing these recessions,” Chiotha said.
Scientists gathering at the COP24 climate talks say it is developing countries like Malawi that are being hit hardest by the impacts of climate change.
The charity Water Aid has released a report ranking the countries worst-hit by water shortages, with Sudan, Niger and Pakistan making up the top three.
“There are people who are living with the impact of climate change right now. And they’re feeling those impacts not through carbon, but through water. And as we’ve seen over the past few years and will continue to see for many years to come unfortunately, is a huge increase in water stress and absolute water scarcity,” Water Aid’s Jonathan Farr told VOA from the climate talks currently underway in the Polish city of Katowice.
Richer nations have pledged $100 billion a year for poorer nations to deal with the consequences of climate change. Water Aid says they are failing to deliver the money.
Scientists say emissions of carbon dioxide would have to be reduced by 45 percent by 2030 to have any hope of keeping global warming below 1.5 degrees Celsius – the target agreed in the Paris climate deal.
However, the number of coal-fired power stations – the most polluting for
m of energy generation – is growing. The German organization ‘Urgewald’ calculates that $478 billion had been invested into expansion of the coal industry between January 2016 and September 2018.
There is little optimism at the talks that much concrete progress will be made, as several countries including the United States, Russia and Saudi Arabia have already voiced objections to a key scientific report from the U.N.’s Intergovernmental Panel on Climate Change. (VOA)