Russia's President Vladimir Putin (R) and Vietnam's President To Lam (L) attend the inauguration of a laboratory for the study and treatment of infectious diseases at the Joint Russian-Vietnamese Tropical Research and Technology Center via video link in Moscow on September 9, 2026. (Photo by MAXIM SHIPENKOV / POOL / AFP via Getty Images)

Russia's President Vladimir Putin (R) and Vietnam's President To Lam (L) attend the inauguration of a laboratory for the study and treatment of infectious diseases at the Joint Russian-Vietnamese Tropical Research and Technology Center via video link in Moscow on September 9, 2026. (Photo by MAXIM SHIPENKOV / POOL / AFP via Getty Images)

Russia's President Vladimir Putin attends the inauguration of a laboratory for the study and treatment of infectious diseases at the Joint Russian-Vietnamese Tropical Research and Technology Center via video link in Moscow on September 9, 2026. (Photo by MAXIM SHIPENKOV / POOL / AFP via Getty Images)

A biologist shows a plastic box containing pinewood nematodes (Bursaphelenchus xylophilus), microscopic worms attacking conifers, breeding on botrytis cinerea fungus at a laboratory of the Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE) in Villenave-d'Ornon, outside Bordeaux, on September 9, 2026. (Photo by Christophe ARCHAMBAULT / AFP via Getty Images)

A biologist uses a microscope to observe pinewood nematodes (Bursaphelenchus xylophilus), microscopic worms attacking conifers, at a laboratory of the Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE) in Villenave-d'Ornon, outside Bordeaux, on September 9, 2026. (Photo by Christophe ARCHAMBAULT / AFP via Getty Images)

This photograph taken on September 9, 2026 shows pinewood nematodes (Bursaphelenchus xylophilus), microscopic worms attacking conifers, seen on a lens during microscopic observation at a laboratory of the Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE) in Villenave-d'Ornon, outside Bordeaux. (Photo by Christophe ARCHAMBAULT / AFP via Getty Images)

A biologist shows a plastic box containing pinewood nematodes (Bursaphelenchus xylophilus), microscopic worms attacking conifers, breeding on botrytis cinerea fungus (R) and a box of botrytis cinerea fungus free of nematodes (L) at a laboratory of the Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE) in Villenave-d'Ornon, outside Bordeaux, on September 9, 2026. (Photo by Christophe ARCHAMBAULT / AFP via Getty Images)

A biologist uses a microscope to observe pinewood nematodes (Bursaphelenchus xylophilus - screen background), microscopic worms attacking conifers, at a laboratory of the Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE) in Villenave-d'Ornon, outside Bordeaux, on September 9, 2026. (Photo by Christophe ARCHAMBAULT / AFP via Getty Images)