logo
China fight with mosquito-borne virus stirs zero-COVID flashbacks

China fight with mosquito-borne virus stirs zero-COVID flashbacks

Nikkei Asia28-07-2025
Economy
City of Foshan deploys PCR tests, home checks, drones against chikungunya
A worker sprays a garden outside a hospital in Foshan, in China's Guangdong province, on July 23, as the city scrambles to contain an outbreak of the mosquito-borne chikungunya virus. © AP
CISSY ZHOU
HONG KONG -- The southern Chinese city of Foshan is racing to contain a mosquito-borne virus with home inspections, PCR tests and drones, conjuring memories of the country's zero-COVID days.
Foshan had confirmed over 4,000 cases of chikungunya as of last Thursday, making it a hot spot for a virus that has prompted warnings from global health officials. The World Health Organization last week called for urgent action to prevent a major chikungunya epidemic from sweeping the globe, as the disease has been detected and transmitted in 119 countries.
Orange background

Try Our AI Features

Explore what Daily8 AI can do for you:

Comments

No comments yet...

Related Articles

US can offer Asia 'customized' AI exports: Trump official
US can offer Asia 'customized' AI exports: Trump official

Nikkei Asia

time11 hours ago

  • Nikkei Asia

US can offer Asia 'customized' AI exports: Trump official

Michael Kratsios speaks at a hearing of the Senate Commerce, Science, and Transportation Committee at the U.S. Capitol in Washington, D.C. while still the nominee to be director of the Office of Science and Technology Policy. © AP STEVEN BOROWIEC INCHEON, South Korea -- The U.S. is seeking to tailor exports of its artificial intelligence technologies to meet the specific needs of Asian countries as part of its push for supremacy in the sector, a Trump administration official told Nikkei Asia.

Study reveals potato's secret tomato past
Study reveals potato's secret tomato past

Japan Today

time17 hours ago

  • Japan Today

Study reveals potato's secret tomato past

A peasant steps on potatoes to begin the elaboration of chuno (dehydrated potato) in Machacamarca, Bolivia, on June 30, 2021 By Issam AHMED You say potato, I say tomato? Turns out one helped create the other: Natural interbreeding between wild tomatoes and potato-like plants in South America gave rise to the modern day spud around nine million years ago, according to a new study published in the journal Cell. Co-author Loren Rieseberg, a professor at the University of British Columbia, told AFP the findings point to a "profound shift" in evolutionary biology, as scientists increasingly recognize the role of ancient hybridization events in shaping the Tree of Life. While it was once thought that random mutations were by far the biggest driver of new species, "we now agree that the creative role of hybridization has been underestimated," he said. Simple, affordable and versatile, the humble potato is now one of the world's most important crops. But its origins have long puzzled scientists. Modern potato plants closely resemble three species from Chile known as Etuberosum. However, these plants do not produce tubers -- the large underground structures, like those found in potatoes and yams, that store nutrients and are the parts we eat. On the other hand, genetic analysis has revealed a surprising closeness to tomatoes. "This is known as discordance, and indicates something interesting is going on!" co-author Sandra Knapp, a research botanist at Britain's Natural History Museum, told AFP. To solve the mystery, an international team of researchers analyzed 450 genomes from cultivated potatoes and 56 wild potato species. Lead author Zhiyang Zhang, of the Agricultural Genomics Institute at Shenzhen, said in a statement: "Wild potatoes are very difficult to sample, so this dataset represents the most comprehensive collection of wild potato genomic data ever analysed." The analysis revealed that modern potatoes carry a balanced genetic legacy from two ancestral species -- roughly 60 percent from Etuberosum and 40 percent from tomatoes. "My wow moment was when the Chinese team showed that ALL potatoes, wild species as well as land races, had basically the same proportion of tomato genes and Etuberosum genes," said Knapp. "That really points to an ancient hybridization event rather than various events of gene exchange later on," she added. "It is so clear cut! Beautiful." One gene called SP6A, a signal for tuberization, came from the tomato lineage. But it only enabled tuber formation when paired with the IT1 gene from Etuberosum, which controls underground stem growth. The divergence between Etuberosum and tomatoes is thought to have begun 14 million years ago -- possibly due to off-target pollination by insects -- and completed nine million years ago. This evolutionary event coincided with the rapid uplift of the Andes mountain range, providing ideal conditions for the emergence of tuber-bearing plants that could store nutrients underground. Another key feature of tubers is their ability to reproduce asexually, sprouting new buds without the need for seeds or pollination -- a trait that helped them spread across South America, and through later human exchange, around the globe. Co-author Sanwen Huang, a professor at the Agricultural Genomics Institute at Shenzhen, told AFP that his lab is now working on a new hybrid potato that can be reproduced by seeds to accelerate breeding. This study suggests that using the tomato "as a chassis of synthetic biology" is a promising route for creating this new potato, he said. © 2025 AFP

Defense Ministry Plans to Develop Laser Beam Systems to Intercept Unmanned Aerial Vehicles, Deploy on Self-Defense Force Ships
Defense Ministry Plans to Develop Laser Beam Systems to Intercept Unmanned Aerial Vehicles, Deploy on Self-Defense Force Ships

Yomiuri Shimbun

timea day ago

  • Yomiuri Shimbun

Defense Ministry Plans to Develop Laser Beam Systems to Intercept Unmanned Aerial Vehicles, Deploy on Self-Defense Force Ships

The Defense Ministry plans to begin research on developing systems that use laser beams to intercept small unmanned aerial vehicles attempting to attack Japan this fiscal year. The aim is to deploy laser interceptor systems on Maritime Self-Defense Force combat ships in fiscal 2031 or later. Military experts point out the possibility that the Chinese military will carry out 'saturation attacks' using a large number of UAVs, and the ministry's objective is to enhance the MSDF's ability to counter such attacks. The ministry plans for the systems to be capable of emitting laser beams at UAVs to burn them or neutralize them by destroying their sensors. Antiaircraft missiles cost hundreds of millions of yen each and are too expensive to be used to intercept UAVs, which can be manufactured at significantly lower costs, a senior official of the Acquisition, Technology and Logistics Agency said. If a swarm of UAVs is used in an attack, there is concern that there will be an insufficient number of missiles to intercept all the UAVs. Laser beams can be emitted in succession if electric power sources are available, and such systems can counter UAVs at lower costs. Ground-based high-power laser cannons that are currently being developed are large. Each cannon is about the size of two 12-meter-long ministry plans to downsize the new laser systems so they can be deployed on destroyers, frigates and other combat ships, and also to secure electric power sources inside the ships so the laser systems can work in conjunction with existing air defense systems. The ministry will conduct operational tests of the laser systems from fiscal 2028 to fiscal 2030. In this fiscal year's budget, the ministry earmarked about ¥18.3 billion for research and development over a five-year period until fiscal 2029. The 2025 defense white paper mentioned that China successfully conducted a swarm flight of 200 UAVs in 2018, and it noted that Japan's conventional air defense equipment will have difficulty countering such swarms. According to the ministry, 30 Chinese UAVs — including objects presumed to be UAVs — were confirmed to be flying near the Nansei Islands in fiscal 2024. Upon detection, the Air Self-Defense Force scrambled fighter jets. That figure is seven-fold compared with four in fiscal 2021. Military experts also point out the possibility that China will mass-produce UAVs for military use from now on.

DOWNLOAD THE APP

Get Started Now: Download the App

Ready to dive into a world of global content with local flavor? Download Daily8 app today from your preferred app store and start exploring.
app-storeplay-store