Taiwan reported one additional case of COVID-19 on May 21, bringing the total to 441. The patient had traveled to Mexico and returned to Taiwan on May 20. He was sent to a centralized quarantine center as soon as he arrived at the airport, and did not come into contact with anyone. Meanwhile, the Central Epidemic Command Center announced the antibody test results for sailors from the Navy's Panshih supplier ship on May 21. Those additional eight sailors had positive antibody tests, meaning that it's likely they were previously infected and should be included on the list of "extremely possible cases.
A COVID-19 cluster outbreak occurred aboard the Navy's Panshih support ship in April. So far, 36 sailors have been confirmed to be infected. On May 21, the Central Epidemic Command Center said an additional eight sailors had positive antibody tests, meaning that it's likely they were previously infected and should be included on the list of "extremely possible cases." Domestic experts say perhaps the number of infected sailors is even higher and there were at least two waves of infection if not more. Moreover, the government's failure to speedily test the sailors for antibodies means that it will be harder to pinpoint the source of the infection.
It must have been someone bringing it onto the ship from Taiwan or someone bringing it onto the ship from Palau. Both these periods were about one month. There's no way that there was only one wave of infection in one month, there must have been at least two to four waves in the one month.
Infectious Diseases Society of Taiwan Chairperson Huang Li-min also said that the sailors were placed in isolation and more than one month has passed. The risk of community transmission should not be too high. Meanwhile, a new American study has reported that an antibody called "S309" has been found in the blood of people previously infected with SARS. This antibody is capable of inhibiting and deactivating the coronavirus that causes COVID-19. In the future, it will be tried out as a treatment.
Parts of their structures are very similar, so if you happen to have an antibody that can inhibit this part, then it will be effective against the 2003 coronavirus as well as the novel coronavirus.
Huang added the results of this study may help the development of drugs to treat COVID-19. However, people need to continue practicing good hygiene such as washing hands frequently and wearing masks as safe and effective treatments and vaccines have not yet been developed.