The Chancellor was first seen shaking uncontrollably on June 18.
The shaking on Wednesday was visible although less severe than during the first episode in June. As in both those cases, the incident started as she stood still without talking, and the 64-year-old recovered quickly as she started walking.
At today's ceremony, authorities adopted security measures usually reserved for high-profile visitors such as Donald Trump or Vladimir Putin with a heavy police presence and a larger-than-usual area cordoned off limits to the general public. "I said recently that I am in a phase of processing the last military honours with President Zelenskiy".
A second shaking attack took place nine days later when she met the new Minister of Justice Christine Lambrecht by Federal President Frank-Walter Steinmeier at Bellevue Castle. She said after the incident that she was feeling fine and that there was no reason for concern.
"I must now keep going with that", added Merkel, who turns 65 next week.
Public figures' health is generally regarded as a private matter in Germany and the country's privacy laws are very strict on that type of information.
"I will have to live with it for a while now, but I am very well and people don't have to be anxious", she added.
These continuing series of violent and uncontrollable shaking incidents will no doubt continue to sow doubts as to whether Chancellor Merkel actually remains in good health.
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Earlier that same year, she had fractured her pelvis while cross-country skiing in Switzerland and was ordered to cut back her schedule dramatically and stay in bed as much as possible for three weeks.
"I behave appropriately as far as my health is concerned", she told reporters when asked about her health at a news conference with the Danish prime minister.
"I believe that just as it happened one day, so it will disappear".
"I am very firmly convinced that I am entirely capable of performing", she added.
Her office has given no explanation for the shaking episodes.
Frequently called the European Union's most influential leader and the most powerful woman in the world, Merkel has said she will leave politics at the end of her term, in 2021.
She gave up the leadership of her center-right party after a pair of poor state election performances that followed a rocky start to her fourth-term government.
Officials had sought to play down fears over her health then, saying that she was fine and that she would not be cancelling any planned engagements.